| O | Either |
| O | Or |
| O-obstruya | Or-bar |
| Oakland | Oakland |
| Oasis | Oasis |
| Oasises | Oases |
| Obedece | Obeys |
| Obedecido | Obeyed |
| Obedeciendo | Obeying |
| Obedezca | Obey |
| Obediencia | Allegiance |
| Obediencia | Obedience |
| Obediencial | Obediential |
| Obediencias | Allegiances |
| Obediente | Duteous |
| Obediente | Dutiful |
| Obediente | Obedient |
| Obedientemente | Obediently |
| Obelisco | Obelisk |
| Obeliscos | Obelisks |
| Obertura | Overture |
| Oberturas | Overtures |
| Obesamente | Obesely |
| Obesidad | Obesity |
| Obesidades | Obesities |
| Obeso | Obese |
| Obi-lívido | Obi-wan |
| Obicuo | Ubiquitous |
| Obispado | Bishopric |
| Obispados | Bishoprics |
| Obispal | Pontifical |
| Obispo | Bishop |
| Obispo | Bishop's |
| Obispos | Bishops |
| Obiter | Obiter |
| Objeciones | Demurrers |
| Objeciones | Objections |
| Objeción | Demurrer |
| Objeción | Objection |
| Objetado | Demurred |
| Objetado | Objected |
| Objetando | Demurring |
| Objetando | Objecting |
| Objetivamente | Factually |
| Objetivamente | Objectively |
| Objetividad | Objectivity |
| Objetivo | Aim |
| Objetivo | Objective |
| Objetivos | Aims |
| Objetivos | Objectives |
| Objeto | Object |
| Objetor | Objector |
| Objetor | Objectors |
| Objetos | Objects |
| Objetos de barro | Stoneware |
| Oblación | Oblation |
| Oblación | Oblations |
| Oblea | Wafer |
| Obleas | Wafers |
| Oblicuamente | Obliquely |
| Oblicuidad | Obliquity |
| Oblicuidades | Obliquities |
| Oblicuo | Askew |
| Oblicuo | Oblique |
| Oblicuo | Obliques |
| Obliga | Obligates |
| Obliga | Obliges |
| Obligaciones | Liabilities |
| Obligaciones | Obligations |
| Obligación | Liability |
| Obligación | Obligation |
| Obligación sin garantía hipotecaria | Debenture |
| Obligación sin garantía hipotecaria | Debentures |
| Obligado | Bludgeoned |
| Obligado | Obligated |
| Obligado | Obliged |
| Obligado a refugiarse en un árbol | Treed |
| Obligando | Bludgeoning |
| Obligando | Obligating |
| Obligando | Obliging |
| Obligando a refugiarse en un árbol | Treeing |
| Obligante | Obligee |
| Obligatoriamente | Compulsorily |
| Obligatoriamente | Mandatorily |
| Obligatoriamente | Obligatorily |
| Obligatorio | Mandatory |
| Obligatorio | Obligatory |
| Obligue | Obligate |
| Obligue | Oblige |
| Oblongamente | Oblongly |
| Oblongo | Oblong |
| Oboe | Oboe |
| Oboes | Oboes |
| Oboísta | Oboist |
| Oboístas | Oboists |
| Obra | Play |
| Obra de arte | Artwork |
| Obra hecha a mano | Handwork |
| Obra lacrimógena | Tearjerker |
| Obra maestra | Masterpiece |
| Obra maestra | Masterwork |
| Obra maestra | Showpiece |
| Obra manual | Handiwork |
| Obra muerta | Freeboard |
| Obras | Plays |
| Obras de arte | Artworks |
| Obras hechas a mano | Handworks |
| Obras lacrimógenas | Tearjerkers |
| Obras maestras | Masterpieces |
| Obras maestras | Masterworks |
| Obras maestras | Showpieces |
| Obrero | Laborer |
| Obrero | Worker |
| Obrero | Workman |
| Obrero | Workman's |
| Obrero metalúrgico | Metalworker |
| Obrero portuario | Longshoreman |
| Obreros | Laborers |
| Obreros | Workers |
| Obreros | Workmen |
| Obreros metalúrgicos | Metalworkers |
| Obreros portuarios | Longshoremen |
| Obscenamente | Bawdily |
| Obscenamente | Obscenely |
| Obscenidad | Bawdiness |
| Obscenidad | Obscenity |
| Obscenidad | Ribaldry |
| Obscenidad | Smut |
| Obscenidad | Smuttiness |
| Obscenidades | Obscenities |
| Obscenidades | Ribaldries |
| Obscenidades | Smuts |
| Obsceno | Bawdy |
| Obsceno | Obscene |
| Obscuramente | Obscurely |
| Obscurantismo | Obscurantism |
| Obscurecido | Shaded |
| Obscureciendo | Shading |
| Obscurecimiento | Obscuration |
| Obscuro | Somber |
| Obscuro | Sombre |
| Obsequio | Giveaway |
| Obsequio | Obsequiousness |
| Obsequio | Treat |
| Obsequios | Giveaways |
| Obsequios | Treats |
| Obsequiosamente | Obsequiously |
| Obsequioso | Obsequious |
| Observa | Observes |
| Observa las estrellas | Stargazes |
| Observacional | Observational |
| Observaciones | Observations |
| Observación | Observation |
| Observación aberrante | Outlier |
| Observación aberrante | Outliers |
| Observado | Observed |
| Observado las estrellas | Stargazed |
| Observador | Observer |
| Observadores | Observers |
| Observancia | Observance |
| Observancias | Observances |
| Observando | Observing |
| Observando las estrellas | Stargazing |
| Observatorio | Observatory |
| Observatorios | Observatories |
| Observe | Observe |
| Observe las estrellas | Stargaze |
| Obsesiona | Obsesses |
| Obsesionado | Obsessed |
| Obsesionando | Obsessing |
| Obsesione | Obsess |
| Obsesiones | Obsessions |
| Obsesivamente | Obsessively |
| Obsesivo | Obsessional |
| Obsesivo | Obsessive |
| Obsesión | Obsession |
| Obsidiana | Obsidian |
| Obsidianas | Obsidians |
| Obsolescencia | Obsolescence |
| Obsoletamente | Obsolescently |
| Obsoletamente | Obsoletely |
| Obsoleto | Obsolescent |
| Obsoleto | Obsolete |
| Obstaculizador | Shackler |
| Obstaculizadores | Shacklers |
| Obstetra | Obstetrician |
| Obstetras | Obstetricians |
| Obstetricias | Obstetrics |
| Obstinaciones | Obstinacies |
| Obstinación | Doggedness |
| Obstinación | Obstinacy |
| Obstinación | Pigheadedness |
| Obstinación | Stubbornness |
| Obstinadamente | Doggedly |
| Obstinadamente | Hardheadedly |
| Obstinadamente | Obstinately |
| Obstinadamente | Opinionatedly |
| Obstinadamente | Peevishly |
| Obstinadamente | Stubbornly |
| Obstinado | Dogged |
| Obstinado | Obdurate |
| Obstinado | Obstinate |
| Obstinado | Opinionated |
| Obstinado | Pig-headed |
| Obstinado | Pigheaded |
| Obstruccionado | Filibustered |
| Obstruccionando | Filibustering |
| Obstrucciones | Obstructions |
| Obstrucciones | Stoppages |
| Obstruccionismo | Obstructionism |
| Obstruccionista | Obstructionist |
| Obstruccionista | Obstructionists |
| Obstrucción | Obstruction |
| Obstrucción | Stoppage |
| Obstructivo | Obstructive |
| Obstruido | Barred |
| Obstruido | Blockaded |
| Obstruido | Obstructed |
| Obstruido con el cieno | Silted |
| Obstruya | Obstruct |
| Obstruye | Obstructs |
| Obstruyendo | Barring |
| Obstruyendo | Blockading |
| Obstruyendo | Obstructing |
| Obstruyendo con el cieno | Silting |
| Obstáculo | Blockage |
| Obstáculo | Obstacle |
| Obstáculos | Blockages |
| Obstáculos | Obstacles |
| Obstétricamente | Obstetrically |
| Obstétrico | Obstetric |
| Obstétrico | Obstetrical |
| Obtención | Obtainment |
| Obtenga | Obtain |
| Obtenido | Obtained |
| Obteniendo | Obtaining |
| Obtiene | Obtains |
| Obturador | Throttler |
| Obturadores | Throttlers |
| Obtusamente | Obtusely |
| Obtuso | Obtuse |
| Obvia | Obviates |
| Obviado | Obviated |
| Obviamente | Obviously |
| Obviando | Obviating |
| Obvie | Obviate |
| Obvio | Obvious |
| Obús | Howitzer |
| Obúses | Howitzers |
| Ocarina | Ocarina |
| Ocarinas | Ocarinas |
| Ocasionado | Occasioned |
| Ocasional | Occasional |
| Ocasionando | Occasioning |
| Ocasiones | Occasions |
| Ocasión | Occasion |
| Ocaso | Sunset |
| Ocasos | Sunsets |
| Occidental | Occidental |
| Occidental | Westerner |
| Occidentales | Occidentals |
| Occidentales | Westerners |
| Occidentalice | Westernize |
| Occidentaliza | Westernizes |
| Occidentalizado | Westernized |
| Occidentalizando | Westernizing |
| Occidente | Occident |
| Occidentes | Occidents |
| Occipital | Occipital |
| Oceangráfico | Oceanographic |
| Oceanografía | Oceanography |
| Oceanología | Oceanology |
| Oceanógrafo | Oceanographer |
| Oceanógrafo | Oceanographers |
| Ocelote | Ocelot |
| Ocelotes | Ocelots |
| Oceánico | Oceanic |
| Ochenta | Eighty |
| Ochenta-columna | Eighty-column |
| Ocho | Eight |
| Ocio | Leisure |
| Ocio-tiempo | Leisure-time |
| Ocios | Leisures |
| Ociosamente | Idly |
| Ociosidad | Idleness |
| Ocioso | Dawdler |
| Ocioso | Idle |
| Ocioso | Idler |
| Ocioso | Lounger |
| Ocioso | Otiose |
| Ociosos | Dawdlers |
| Ociosos | Idlers |
| Ociosos | Loungers |
| Ocluido | Occluded |
| Oclusiones | Occlusions |
| Oclusivo | Occlusive |
| Oclusión | Occlusion |
| Ocluya | Occlude |
| Ocluye | Occludes |
| Ocluyendo | Occluding |
| Ocre | Ocher |
| Ocre | Ochre |
| Ocres | Ochers |
| Ocres | Ochres |
| Oct | Oct |
| Octaedrita | Anatase |
| Octal | Octal |
| Octano | Octane |
| Octanos | Octanes |
| Octante | Octant |
| Octante | Octants |
| Octava | Octave |
| Octavas | Octaves |
| Octavo | Eighth |
| Octavo | Eighths |
| Octeto | Octet |
| Octetos | Octets |
| Octogenario | Octogenarian |
| Octogenarios | Octogenarians |
| Octogésimo | Eightieth |
| Octogésimo | Eightieths |
| Octágono | Octagon |
| Octágono | Octagonal |
| Octágonos | Octagons |
| Octubre | October |
| Octubre | October's |
| Océano | Ocean |
| Océanos | Oceans |
| Ocular | Eyepiece |
| Ocular | Ocular |
| Oculares | Eyepieces |
| Oculares | Oculars |
| Ocularmente | Ocularly |
| Oculista | Oculist |
| Oculistas | Oculists |
| Oculta | Conceals |
| Ocultaciones | Hidings |
| Ocultación | Concealment |
| Ocultado | Concealed |
| Ocultado | Hided |
| Ocultado | Occulted |
| Ocultado un micrófono en | Bugged |
| Ocultamente | Hiddenly |
| Ocultamente | Occultly |
| Ocultando | Concealing |
| Ocultando | Occulting |
| Ocultando un micrófono en | Bugging |
| Oculte | Conceal |
| Ocultismo | Occultism |
| Ocultista | Occultist |
| Ocultista | Occultists |
| Ocupa | Busies |
| Ocupa | Occupies |
| Ocupaciones | Occupancies |
| Ocupaciones | Occupations |
| Ocupación | Occupancy |
| Ocupación | Occupation |
| Ocupado | Busied |
| Ocupado | Busy |
| Ocupado | Occupied |
| Ocupado-de espera | Busy-waiting |
| Ocupado-espere | Busy-wait |
| Ocupando | Busying |
| Ocupando | Occupying |
| Ocupante | Occupant |
| Ocupante | Occupier |
| Ocupantes | Occupants |
| Ocupantes | Occupiers |
| Ocupe | Occupy |
| Ocupándose vanamente | Tinkering |
| Ocurra | Befall |
| Ocurra | Occur |
| Ocurre | Befalls |
| Ocurre | Occurs |
| Ocurrencia | Occurrence |
| Ocurrencias | Occurrences |
| Ocurrido | Befallen |
| Ocurrido | Befell |
| Ocurrido | Occurred |
| Ocurriendo | Befalling |
| Ocurriendo | Occurring |
| Ocúpese vanamente | Tinker |
| Oda | Ode |
| Odalisca | Odalisque |
| Odas | Odes |
| Odiado | Hated |
| Odiando | Hating |
| Odio | Hate |
| Odio | Hatred |
| Odio | Odium |
| Odios | Hates |
| Odios | Hatreds |
| Odios | Odiums |
| Odiosamente | Hatefully |
| Odiosamente | Heinously |
| Odiosamente | Obnoxiously |
| Odiosamente | Odiously |
| Odiosidad | Obnoxiousness |
| Odioso | Hateful |
| Odioso | Heinous |
| Odioso | Odious |
| Odisea | Odyssey |
| Odiseas | Odysseys |
| Odiseo | Odysseus |
| Odorante | Odorant |
| Odorífero | Odoriferous |
| Odre | Wineskin |
| Odres | Wineskins |
| Odómetro | Odometer |
| Odómetros | Odometers |
| Oersted | Oersted |
| Oeste-costa | West-coast |
| Oestes | Wests |
| Ofenda | Offend |
| Ofende | Offends |
| Ofendido | Miffed |
| Ofendido | Offended |
| Ofendido | Piqued |
| Ofendiendo | Miffing |
| Ofendiendo | Offending |
| Ofendiendo | Piquing |
| Ofensa | Miff |
| Ofensa | Offence |
| Ofensa | Offense |
| Ofensas | Miffs |
| Ofensas | Offences |
| Ofensas | Offenses |
| Ofensiva | Offensive |
| Ofensivamente | Nastily |
| Ofensivamente | Offensively |
| Ofensivas | Offensives |
| Ofensivo | Uncomplimentary |
| Ofensor | Offender |
| Ofensores | Offenders |
| Oferente | Offerer |
| Oferentes | Offerers |
| Oferta | Bid |
| Oferta | Offer |
| Oferta | Tender |
| Ofertas | Bids |
| Ofertas | Offers |
| Ofertas | Tenders |
| Ofertorio | Offertory |
| Ofertorios | Offertories |
| Office | Office |
| Office-buscador | Office-seeker |
| Offices | Offices |
| Oficia | Officiates |
| Oficiado | Officiated |
| Oficial | Official |
| Oficiales | Officials |
| Oficialmente | Officially |
| Oficiando | Officiating |
| Oficiante | Officiant |
| Oficiante | Officiants |
| Oficie | Officiate |
| Oficinal | Officinal |
| Oficiosamente | Nonofficially |
| Oficiosamente | Officiously |
| Oficiosidad | Officiousness |
| Oficioso | Nonofficial |
| Oficioso | Officious |
| Ofidio | Ophidian |
| Ofrecido | Featured |
| Ofrecido | Offered |
| Ofrecido | Volunteered |
| Ofreciendo | Bidding |
| Ofreciendo | Featuring |
| Ofreciendo | Offering |
| Ofreciendo | Volunteering |
| Ofrendas | Offerings |
| Oftalmología | Ophthalmology |
| Oftalmologías | Ophthalmologies |
| Oftalmoscopia | Ophthalmoscopies |
| Oftalmoscopia | Ophthalmoscopy |
| Oftalmoscopio | Ophthalmoscope |
| Oftalmoscopio | Ophthalmoscopes |
| Oftalmólogo | Ophthalmologist |
| Oftalmólogos | Ophthalmologists |
| Oftálmico | Ophthalmic |
| Ofusca | Obfuscates |
| Ofuscación | Obfuscation |
| Ofuscado | Obfuscated |
| Ofuscando | Obfuscating |
| Ofusque | Obfuscate |
| Ogresa | Ogress |
| Ogresas | Ogresses |
| Ogro | Ogre |
| Ogros | Ogres |
| Oh | Oh |
| Ohio | Ohio |
| Ohm | Ohm |
| Ohmes | Ohms |
| Ohmímetro | Ohmmeter |
| Ohmímetros | Ohmmeters |
| Oidor | Hearer |
| Oidores | Hearers |
| Oiga | Hear |
| Ojal | Buttonhole |
| Ojal | Grommet |
| Ojales | Buttonholes |
| Ojales | Grommets |
| Ojeada | Ogle |
| Ojeada | Peep |
| Ojeada-muestre | Peep-show |
| Ojeadas | Ogles |
| Ojeadas | Peeps |
| Ojete | Eyelet |
| Ojetes | Eyelets |
| Ojiva | Ogee |
| Ojiva | Ogive |
| Ojiva | Warhead |
| Ojivas | Ogees |
| Ojivas | Warheads |
| Ojo | Eye |
| Ojo a la funerala | Shiner |
| Ojo de la cerradura | Keyhole |
| Ojo de lince | Eagle-eyed |
| Ojo-dientes | Eye-teeth |
| Ojo-testigo | Eye-witness |
| Ojo-vidriando | Eye-glazing |
| Ojos | Eyes |
| Ojos a la funerala | Shiners |
| Ojos de la cerradura | Keyholes |
| Ojos desorbitados | Wide-eyed |
| Oklahoma | Oklahoma |
| Ola | Billow |
| Ola | Surge |
| Ola | Wave |
| Ola grande | Breaker |
| Olas | Billows |
| Olas | Surges |
| Olas | Waves |
| Olas grandes | Breakers |
| Oldsmobile | Oldsmobile |
| Oleaginoso | Oleaginous |
| Oleaje | Surf |
| Oleajes | Surfs |
| Oleorresina | Oleoresin |
| Olfacción | Olfaction |
| Olfateado | Scented |
| Olfateado | Sniffed |
| Olfateador | Sniffer |
| Olfateadores | Sniffers |
| Olfateando | Scenting |
| Olfateando | Sniffing |
| Olfateo | Sniff |
| Olfateos | Sniffs |
| Olfativo | Olfactory |
| Olfato | Flair |
| Olfatos | Flairs |
| Olido | Nosed |
| Olido | Smelled |
| Olido | Whiffed |
| Oliendo | Nosing |
| Oliendo | Smelling |
| Oliendo | Whiffing |
| Oligarca | Oligarch |
| Oligarquía | Oligarchy |
| Oligarquías | Oligarchies |
| Oligoceno | Oligocene |
| Oligopolio | Oligopoly |
| Oligárquico | Oligarchic |
| Oligárquico | Oligarchical |
| Olimpiada | Olympiad |
| Olimpiadas | Olympiads |
| Olimpo | Olympus |
| Oliver | Oliver |
| Olivina | Olivine |
| Olivinas | Olivines |
| Olla | Boiler |
| Olla | Kettle |
| Olla | Pot |
| Olla-hinchado | Pot-bellied |
| Ollas | Boilers |
| Ollas | Kettles |
| Ollas | Pots |
| Olmo | Elm |
| Olmos | Elms |
| Olomina | Guppies |
| Olomina | Guppy |
| Olor | Odor |
| Olor | Odour |
| Olor | Scent |
| Olor | Smell |
| Olor a cerrado | Mustiness |
| Olor-fiesta | Smell-feast |
| Olores | Odors |
| Olores | Odours |
| Olores | Scents |
| Olores | Smells |
| Olorosamente | Odorously |
| Oloroso | Odorous |
| Olvidable | Forgettable |
| Olvidadamente | Forgetfully |
| Olvidadamente | Obliviously |
| Olvidado | Forgetful |
| Olvidado | Oblivious |
| Olvido | Forgetfulness |
| Olvido | Oblivion |
| Olvidos | Oblivions |
| Olvidándose | Forgetting |
| Olvídese | Forget |
| Olímpico | Olympian |
| Olímpico | Olympians |
| Omaha | Omaha |
| Ombligo | Navel |
| Ombligo | Umbilicus |
| Ombligos | Navels |
| Ombligos | Umbilicuses |
| Omega | Omega |
| Omegas | Omegas |
| Ominosamente | Balefully |
| Ominosamente | Ominously |
| Ominoso | Ominous |
| Omisiones | Omissions |
| Omisión | Omission |
| Omita | Omit |
| Omite | Omits |
| Omitido | Omitted |
| Omitiendo | Omitting |
| Omni | Omni |
| Omnidireccional | Nondirectional |
| Omnipotencia | Omnipotence |
| Omnipotente | Almighty |
| Omnipotente | Omnipotent |
| Omnipotentemente | Almightily |
| Omnipotentemente | Omnipotently |
| Omnipresencia | Omnipresence |
| Omnipresente | Omnipresent |
| Omnisciencia | Omniscience |
| Omnisciente | Omniscient |
| Omniscientemente | Omnisciently |
| Omnívoramente | Omnivorously |
| Omnívoro | Omnivore |
| Omnívoro | Omnivores |
| Omnívoro | Omnivorous |
| Once | Eleven |
| Oncología | Oncologies |
| Oncología | Oncology |
| Oncológico | Oncologic |
| Oncológico | Oncological |
| Onda | Ripple |
| Onda corta | Short-wave |
| Onda corta | Shortwave |
| Onda hertziana | Airwave |
| Ondas | Ripples |
| Ondas cortas | Shortwaves |
| Ondas hertziana | Airwaves |
| Ondeado | Rippled |
| Ondeando | Rippling |
| Ondeando | Waving |
| Ondeante | Billowy |
| Ondula | Undulates |
| Ondulaciones | Undulations |
| Ondulación | Undulation |
| Ondulación | Waviness |
| Onduladamente | Wavily |
| Ondulado | Corrugate |
| Ondulado | Undulate |
| Ondulado | Undulated |
| Ondulado | Wavy |
| Ondulando | Undulating |
| Ondulante | Undulant |
| Onerosamente | Onerously |
| Onerosidad | Onerousness |
| Oneroso | Onerous |
| Ones-complemento | Ones-complement |
| Onomatopeya | Onomatopoeia |
| Onomatopéyicamente | Onomatopoeically |
| Onomatopéyico | Onomatopoeic |
| Onomatopéyico | Onomatopoetic |
| Ontario | Ontario |
| Ontogenia | Ontogeny |
| Ontogenias | Ontogenies |
| Ontogénesis | Ontogeneses |
| Ontogénesis | Ontogenesis |
| Ontogénico | Ontogenetic |
| Ontología | Ontology |
| Ontologías | Ontologies |
| Ontológico | Ontological |
| Onz. | Oz |
| Onza | Cheetah |
| Onza | Ounce |
| Onzas | Cheetahs |
| Onzas | Ounces |
| Oolita | Oolite |
| Opacamente | Filmily |
| Opacamente | Opaquely |
| Opacidad | Filminess |
| Opacidad | Opacity |
| Opacidad | Opaqueness |
| Opacidades | Opacities |
| Opaco | Opaque |
| Opal | Opal |
| Opalescencia | Opalescence |
| Opalescente | Opalescent |
| Opalino | Opaline |
| Opcionalmente | Optionally |
| Opciones | Choices |
| Opciones | Options |
| Opción | Choice |
| Opción | Option |
| Opción de venta de acciones | Put |
| Opción de venta de acciones | Puts |
| Opec | Opec |
| Opera | Operates |
| Operabilidad | Operability |
| Operabilidades | Operabilities |
| Operable | Operable |
| Operacional | Operational |
| Operacionalmente | Operationally |
| Operación de vigilancia | Stakeout |
| Operación de vigilancia | Stakeouts |
| Operado | Operated |
| Operador | Operator |
| Operador | Projectionist |
| Operador cinematográfico | Cameraman |
| Operadores | Operators |
| Operadores | Projectionists |
| Operadores cinematográficos | Cameramen |
| Operando | Operand |
| Operando | Operands |
| Operando | Operating |
| Operativamente | Operatively |
| Operatorio | Operative |
| Operatorio | Operatives |
| Opere | Operate |
| Opereta | Operetta |
| Operetas | Operettas |
| Operístico | Operatic |
| Opiato | Opiate |
| Opiatos | Opiates |
| Opina | Opines |
| Opinado | Opined |
| Opinando | Opining |
| Opine | Opine |
| Opiniones | Opinions |
| Opinión | Opinion |
| Opio | Opium |
| Opios | Opiums |
| Opone | Opposes |
| Oponente | Contestant |
| Oponentes | Contestants |
| Oponga | Oppose |
| Oponiendo | Opposing |
| Oponiéndose | Bucking |
| Oponiéndose a | Antagonizing |
| Oponiéndose a | Countering |
| Oportunamente | Expediently |
| Oportunamente | Opportunely |
| Oportunidad | Chance |
| Oportunidad | Opportunity |
| Oportunidad-dependiente | Timing-dependent |
| Oportunidades | Chances |
| Oportunidades | Opportunities |
| Oportunidades | Timings |
| Oportunismo | Opportunism |
| Oportunista | Chiseler |
| Oportunista | Opportunist |
| Oportunistas | Chiselers |
| Oportunistas | Opportunists |
| Oportuno | Apropos |
| Oportuno | Opportune |
| Oportuno | Opportunistic |
| Oportuno | Timely |
| Oposiciones | Oppositions |
| Oposición | Opposition |
| Opositor | Opposer |
| Opositores | Opposers |
| Oposum | Opossum |
| Oposums | Opossums |
| Opresivamente | Extortionately |
| Opresivamente | Oppressively |
| Opresivo | Extortionate |
| Opresivo | Oppressive |
| Opresión | Oppression |
| Opresión | Oppressiveness |
| Opresor | Oppressor |
| Opresores | Oppressors |
| Oprima | Oppress |
| Oprime | Oppresses |
| Oprimido | Oppressed |
| Oprimiendo | Oppressing |
| Oprobio | Opprobrium |
| Oprobios | Opprobriums |
| Opta | Opts |
| Optado | Opted |
| Optando | Opting |
| Optativo | Optative |
| Optativo | Optional |
| Opte | Opt |
| Optimismo | Optimism |
| Optimismo | Sanguineness |
| Optimismos | Optimisms |
| Optimista | Optimist |
| Optimista | Optimistic |
| Optimista | Upbeat |
| Optimistas | Optimists |
| Optimizaciones | Optimizations |
| Optimización | Optimization |
| Optometrista | Optometrist |
| Optometristas | Optometrists |
| Optometría | Optometry |
| Optometrías | Optometries |
| Opuestamente | Oppositely |
| Opuesto | Opposed |
| Opulencia | Opulence |
| Opulencias | Opulences |
| Opulentamente | Opulently |
| Opulento | Affluent |
| Opulento | Affluents |
| Opulento | Opulent |
| Opus | Opus |
| Opus | Opuses |
| Opíparamente | Sumptuously |
| Opóngase a | Antagonise |
| Opóngase a | Antagonize |
| Oquedad | Hollowness |
| Ora | Orates |
| Ora | Prays |
| Oraciones | Orations |
| Oraciones | Prayers |
| Oración | Oration |
| Oración | Prayer |
| Orado | Orated |
| Orado | Prayed |
| Orador | Keynoter |
| Orador | Orator |
| Orador arrebatador | Spellbinder |
| Oradores | Keynoters |
| Oradores | Orators |
| Oradores arrebatadores | Spellbinders |
| Oral | Oral |
| Oral | Orals |
| Oralidad | Orality |
| Oralidades | Oralities |
| Oralmente | Orally |
| Orando | Orating |
| Orando | Praying |
| Orangutanes | Orangutans |
| Orangután | Orangutan |
| Oratoriamente | Oratorically |
| Oratorio | Oratorical |
| Oratorio | Oratorio |
| Oratorio | Oratory |
| Oratorios | Oratories |
| Oratorios | Oratorios |
| Orbe | Orb |
| Orbes | Orbs |
| Orbicular | Orbicular |
| Orbitado | Orbited |
| Orbital | Orbital |
| Orbitando | Orbiting |
| Orden | Injunction |
| Orden | Order |
| Orden | Orderliness |
| Orden | Tidiness |
| Ordena | Assorts |
| Ordena | Bespeaks |
| Ordena | Ordains |
| Ordenaciones | Ordinations |
| Ordenación | Ordainment |
| Ordenación | Ordination |
| Ordenación aleatoria | Randomization |
| Ordenada | Ordinate |
| Ordenadamente | Orderly |
| Ordenadas | Northings |
| Ordenadas | Ordinates |
| Ordenado | Assorted |
| Ordenado | Commanded |
| Ordenado | Marshaled |
| Ordenado | Ordained |
| Ordenado | Sorted |
| Ordenado | Tidy |
| Ordenancista | Disciplinarian |
| Ordenancista | Martinet |
| Ordenancistas | Disciplinarians |
| Ordenancistas | Martinets |
| Ordenando | Assorting |
| Ordenando | Bespeaking |
| Ordenando | Commanding |
| Ordenando | Marshaling |
| Ordenando | Ordaining |
| Ordenando | Sorting |
| Ordenanza | Ordinance |
| Ordenanzas | Orderlies |
| Ordenanzas | Ordinances |
| Ordene | Assort |
| Ordene | Bespeak |
| Ordene | Ordain |
| Ordeña | Milks |
| Ordeñado | Milked |
| Ordeñador | Milker |
| Ordeñadores | Milkers |
| Ordeñando | Milking |
| Ordinal | Ordinal |
| Ordinal | Ordinals |
| Ordinariamente | Ordinarily |
| Ordinariez | Ordinariness |
| Ordinario | Ordinary |
| Ordinario | Unexceptional |
| Ordoviciano | Ordovician |
| Ore | Orate |
| Ore | Pray |
| Oregón | Oregon |
| Oreja | Ear |
| Oreja de mar | Abalone |
| Oreja-penetrante | Ear-piercing |
| Oreja-rasgándose | Ear-rending |
| Orejas | Ears |
| Orejera | Earflap |
| Orejera | Earmuff |
| Orejeras | Earflaps |
| Orejeras | Earmuffs |
| Orfandad | Orphanage |
| Orfandad | Orphanhood |
| Orfandades | Orphanages |
| Orfebre | Goldsmith |
| Orfebres | Goldsmiths |
| Organdí | Organdy |
| Organdíes | Organdies |
| Organice | Organise |
| Organice | Organize |
| Organice de antemano | Prearrange |
| Organismo | Organism |
| Organismos | Organisms |
| Organista | Organist |
| Organistas | Organists |
| Organiza | Organises |
| Organiza | Organizes |
| Organiza de antemano | Prearranges |
| Organizaciones | Organizations |
| Organización | Organization |
| Organización | Organization's |
| Organización previa | Prearrangement |
| Organización-mapa | Organization-chart |
| Organizado | Hosted |
| Organizado | Organised |
| Organizado | Organized |
| Organizado | Staged |
| Organizado de antemano | Prearranged |
| Organizador | Host |
| Organizador | Organiser |
| Organizador | Organizer |
| Organizadores | Hosts |
| Organizadores | Organizers |
| Organizando | Hosting |
| Organizando | Organizing |
| Organizando | Staging |
| Organizando de antemano | Prearranging |
| Orgasmo | Orgasm |
| Orgasmos | Orgasms |
| Orgánicamente | Organically |
| Orgánico | Organic |
| Orgánico | Organizational |
| Orgásmico | Orgasmic |
| Orgullo | Haughtiness |
| Orgullo | Pride |
| Orgullos | Prides |
| Orgullosamente | Haughtily |
| Orgullosamente | Pridefully |
| Orgullosamente | Proudly |
| Orgulloso | Haughty |
| Orgulloso | Prideful |
| Orgulloso | Proud |
| Orgulloso-coronado | Proud-crested |
| Orgía | Orgy |
| Orgías | Orgies |
| Orienta | Orientates |
| Orienta | Orients |
| Orientable | Vectored |
| Orientaciones | Orientations |
| Orientación | Orientation |
| Orientado | Angled |
| Orientado | Orientated |
| Orientado | Oriented |
| Oriental | Eastern |
| Oriental | Easterner |
| Oriental | Oriental |
| Orientales | Easterners |
| Orientales | Orientals |
| Orientando | Angling |
| Orientando | Orientating |
| Orientando | Orienting |
| Oriente | Orient |
| Oriente | Orientate |
| Orificio | Orifice |
| Orificio nasal | Nostril |
| Orificios | Orifices |
| Orificios nasales | Nostrils |
| Origen | Origin |
| Origen | Origination |
| Origina | Originates |
| Originado | Originated |
| Original | Original |
| Original | Primal |
| Original | Unconventional |
| Originales | Originals |
| Originalidad | Originality |
| Originalidad | Quaintness |
| Originalidades | Originalities |
| Originalmente | Originally |
| Originalmente | Unconventionally |
| Originando | Originating |
| Origine | Originate |
| Orilla | Shore |
| Orilla del camino | Roadside |
| Orillado | Bordered |
| Orillando | Bordering |
| Orillas | Shores |
| Orillas del camino | Roadsides |
| Orillo | Selvage |
| Orillo | Selvedge |
| Orillos | Selvedges |
| Orina | Urinates |
| Orina | Urine |
| Orinado | Peed |
| Orinado | Urinated |
| Orinando | Peeing |
| Orinando | Urinating |
| Orinas | Urines |
| Orine | Urinate |
| Oriundo de Carolina | Carolinian |
| Oriundo de Carolina | Carolinians |
| Oriundo de Rhodesia | Rhodesian |
| Oriundo de Rhodesia | Rhodesians |
| Orlado | Fringed |
| Orlando | Fringing |
| Orleans | Orleans |
| Orlón | Orlon |
| Ornadamente | Ornately |
| Ornamentaciones | Ornamentations |
| Ornamentación | Ornamentation |
| Ornamentado | Ornamented |
| Ornamental | Ornamental |
| Ornamentando | Ornamenting |
| Ornamento | Ornament |
| Ornamentos | Ornaments |
| Ornitología | Ornithology |
| Ornitológico | Ornithological |
| Ornitorrinco | Platypus |
| Ornitorrinco | Platypuses |
| Ornitólogo | Ornithologist |
| Ornitólogos | Ornithologists |
| Oro | Gold |
| Oro en lingotes | Bullion |
| Oro en lingotes | Bullions |
| Oro-retrocedido | Gold-backed |
| Orogenia | Orogeny |
| Orogénico | Orogenic |
| Oropel | Tinsel |
| Oropeles | Tinsels |
| Oropimentes | Orpiments |
| Oropéndola | Oriole |
| Oropéndolas | Orioles |
| Orquesta | Orchestra |
| Orquesta | Orchestrates |
| Orquestaciones | Orchestrations |
| Orquestación | Orchestration |
| Orquestado | Orchestrated |
| Orquestal | Orchestral |
| Orquestalmente | Orchestrally |
| Orquestando | Orchestrating |
| Orquestas | Orchestras |
| Orqueste | Orchestrate |
| Orquídea | Orchid |
| Orquídeas | Orchids |
| Oráculo | Oracle |
| Oráculos | Oracles |
| Ortho | Ortho |
| Ortiga | Nettle |
| Ortigas | Nettles |
| Ortodoncia | Orthodontia |
| Ortodoncia | Orthodontics |
| Ortodontista | Orthodontist |
| Ortodontista | Orthodontists |
| Ortodoxia | Orthodoxy |
| Ortodoxias | Orthodoxies |
| Ortodoxo | Orthodox |
| Ortodóntico | Orthodontic |
| Ortografía | Orthography |
| Ortografías | Spellings |
| Ortográficamente | Orthographically |
| Ortográfico | Orthographic |
| Ortología | Orthoepy |
| Ortopedia | Orthopedics |
| Ortopedista | Orthopedist |
| Ortopedistas | Orthopedists |
| Ortopédicamente | Orthopedically |
| Ortopédico | Orthopaedic |
| Ortopédico | Orthopedic |
| Oruga | Caterpillar |
| Oruga geómetra | Inchworm |
| Orégano | Oregano |
| Oréganos | Oreganos |
| Orugas | Caterpillars |
| Orugas geómetras | Inchworms |
| Orígenes | Origins |
| Orza | Luff |
| Orzado | Luffed |
| Orzas | Luffs |
| Os-apoyado | Os-supported |
| Osadamente | Daringly |
| Oscar | Oscar |
| Oscila | Oscillates |
| Oscilaciones | Oscillations |
| Oscilaciones | Sways |
| Oscilación | Oscillation |
| Oscilación | Sway |
| Oscilado | Oscillated |
| Oscilado | Swayed |
| Oscilador | Oscillator |
| Oscilador | Swinger |
| Osciladores | Oscillators |
| Osciladores | Swingers |
| Oscilando | Oscillating |
| Oscilando | Swaying |
| Oscilante | Fluttery |
| Oscilante | Tiltable |
| Oscilatorio | Oscillatory |
| Oscile | Oscillate |
| Osciloscopio | Oscilloscope |
| Osciloscopios | Oscilloscopes |
| Oscilógrafo | Oscillograph |
| Oscuramente | Darkly |
| Oscuramente | Dimly |
| Oscuramente | Dingily |
| Oscuramente | Duskily |
| Oscuramente | Murkily |
| Oscurece | Darkens |
| Oscurece | Dims |
| Oscurecido | Darkened |
| Oscurecido | Dimmed |
| Oscurecido | Gloomed |
| Oscureciendo | Darkening |
| Oscureciendo | Dimming |
| Oscureciendo | Glooming |
| Oscurezca | Darken |
| Oscuridad | Blackness |
| Oscuridad | Darkness |
| Oscuridad | Gloom |
| Oscuridad | Murk |
| Oscuridad | Murkiness |
| Oscuridad | Obscurity |
| Oscuridades | Darks |
| Oscuridades | Glooms |
| Oscuridades | Murks |
| Oscuridades | Obscurities |
| Oscuro | Dark |
| Oscuro | Dim |
| Oscuro | Dingy |
| Oscuro | Dusky |
| Oscuro | Gloomy |
| Oscuro | Murky |
| Oscuro | Shadowy |
| Oscuro | Unlighted |
| Oscuro-emitiendo | Dark-emitting |
| Oscuro-lado | Dark-side |
| Oscuro-mirado | Dim-eyed |
| Oscuro-vidente | Dim-sighted |
| Osificaciones | Ossifications |
| Osificación | Ossification |
| Osificándose | Ossifying |
| Osifiqúese | Ossify |
| Ositos | Teddies |
| Oslo | Oslo |
| Osmótico | Osmotic |
| Oso | Bear |
| Oso hormiguero | Anteater |
| Oso marsupial | Koala |
| Osos | Bears |
| Osos hormigueros | Anteaters |
| Osos marsupiales | Koalas |
| Ostensible | Ostensible |
| Ostensiblemente | Ostensibly |
| Ostensivo | Ostensive |
| Ostentaciones | Flaunts |
| Ostentación | Flaunt |
| Ostentación | Ostentation |
| Ostentación | Showiness |
| Ostentador | Flaunter |
| Ostentadores | Flaunters |
| Ostentosamente | Flamboyantly |
| Ostentosamente | Gaudily |
| Ostentoso | Gaudy |
| Ostentoso | Ostentatious |
| Osteoartritis | Osteoarthritis |
| Osteopatía | Osteopathy |
| Osteopatías | Osteopathies |
| Osteoporosis | Osteoporosis |
| Osteopático | Osteopathic |
| Osteópata | Osteopath |
| Osteópatas | Osteopaths |
| Ostra | Bluepoint |
| Ostra | Oyster |
| Ostracismo | Ostracism |
| Ostras | Bluepoints |
| Ostras | Oysters |
| Oswego | Oswego |
| Otolaringología | Otolaryngology |
| Otolaringologías | Otolaryngologies |
| Otomano | Ottoman |
| Otorgado | Accorded |
| Otorgado | Awarded |
| Otorgador | Grantor |
| Otorgadores | Grantors |
| Otorgamiento de subvención | Subsidization |
| Otorgamiento de subvención | Subsidizations |
| Otorgando | Awarding |
| Otorrinolaringólogo | Otolaryngologist |
| Otorrinolaringólogo | Otolaryngologists |
| Otoñal | Autumnal |
| Otoño | Autumn |
| Otoños | Autumns |
| Otro | Another |
| Otro | Another's |
| Otro | Other |
| Otro | Other's |
| Otro-mundano | Other-worldly |
| Otros | Others |
| Ottawa | Ottawa |
| Ottawas | Ottawas |
| Otto | Otto |
| Ovaciones | Ovations |
| Ovación | Ovation |
| Ovalado | Oval |
| Ovalado | Ovals |
| Ovalmente | Ovally |
| Ovario | Ovary |
| Ovarios | Ovaries |
| Oveja | Ewe |
| Oveja | Sheep |
| Ovejas | Ewes |
| Overol | Dungaree |
| Ovidio | Ovid |
| Oviducto | Oviduct |
| Oviductos | Oviducts |
| Ovillado | Balled |
| Ovillando | Balling |
| Ovoide | Ovoid |
| Ovoide | Ovoidal |
| Ovárico | Ovarial |
| Ovárico | Ovarian |
| Ovula | Ovulates |
| Ovulaciones | Ovulations |
| Ovulación | Ovulation |
| Ovulado | Ovulated |
| Ovulando | Ovulating |
| Ovule | Ovulate |
| Ovíparo | Oviparous |
| Oxford | Oxford |
| Oxiacetileno | Oxyacetylene |
| Oxida | Oxidizes |
| Oxidable | Oxidizable |
| Oxidaciones | Oxidations |
| Oxidación | Oxidation |
| Oxidación | Rustiness |
| Oxidado | Oxidized |
| Oxidado | Rusted |
| Oxidando | Oxidizing |
| Oxidando | Rusting |
| Oxidante | Oxidant |
| Oxidante | Oxidative |
| Oxidante | Oxidizer |
| Oxidantes | Oxidants |
| Oxidantes | Oxidizers |
| Oxide | Oxidise |
| Oxide | Oxidize |
| Oxigena | Oxygenates |
| Oxigenación | Oxygenation |
| Oxigenado | Oxygenated |
| Oxigenando | Oxygenating |
| Oxigene | Oxygenate |
| Oxálico | Oxalic |
| Oxígeno | Oxygen |
| Oxímoro | Oxymoron |
| Oído | Heard |
| Oído por casualidad | Overheard |
| Oídos | Hearings |
| Oye | Hark |
| Oye | Hears |
| Oyendo | Hearing |
| Oyendo por casualidad | Overhearing |
| Oyente | Listener |
| Oyentes | Listeners |
| Ozono | Ozone |
| Ozonos | Ozones |
| óbolo | Mite |
| óbolos | Mites |
| ómnibus | Jitney |
| ómnibus | Omnibus |
| ómnibuses | Jitneys |
| ómnibuses | Omnibuses |
| ónix | Onyx |
| ónixes | Onyxes |
| ópalos | Opals |
| ópera | Opera |
| ópera - | Opera- |
| óperas | Operas |
| ópticas | Optics |
| óptimo | Optima |
| óptimos | Optimums |
| órbita | Orbit |
| órbitas | Orbits |
| órdenes | Biddings |
| órdenes | Injunctions |
| órdenes | Orders |
| órgano | Organ |
| órgano vitales | Vitals |
| órganos | Organs |
| órganos genitales | Genitals |
| órquide | Orchis |
| ósculo | Osculation |
| ósculos | Osculations |
| ósmosis | Osmoses |
| ósmosis | Osmosis |
| óvulo | Ovum |
| óvulos | Ova |
| óxido | Oxide |
| óxido | Rust |
| óxido-reducción | Redox |
| óxidos | Oxides |
| óxidos | Rusts |
