Spanish Words That Start With O | List & Examples
There are many words that start with O in Spanish. Some may be familiar to English speakers (e.g., “océano,” “ojo,” and “oliva”),but others won’t be.
Below, you’ll find lists of some adjectives, nouns, verbs, and other words that start with O in Spanish.
QuillBot’s Grammar Checker helps you avoid spelling and grammar mistakes, even when writing in Spanish.
Spanish adjectives that start with O
Some Spanish adjectives that start with O are:
- Obediente: obedient
- Obeso: obese
- Objetivo: objective
- Oblicuo: oblique; at an angle
- Obligado: forced; obliged
- Obrero: working-class
- Obsceno: obscene
- Obsoleto: obsolete
- Obstinado: obstinate; stubborn
- Obvio: obvious
- Ocasional: occasional
- Ocioso: idle; unused
- Odioso: hateful; unpleasant
- Ofendido: offended
- Ofensivo: offensive
- Oficial: official
- Ofuscado: dazed; mentally clouded
- Olvidado: forgotten
- Omaní: Omani (of/from Oman)
- Ominoso: ominous
- Omnipotente: all-powerful; omnipotent
- Omnipresente: omnipresent
- Omnisciente: omniscient
- Ondulado: wavy
- Oneroso: burdensome; onerous
- Opaco: opaque
- Opcional: optional
- Oportuno: timely; well-timed
- Opresivo: oppressive
- Optimista: optimistic
- Oral: oral
- Ordenado: tidy; organized
- Ordinario: ordinary; vulgar; coarse
- Orgánico: organic
- Organizado: organized
- Orgulloso: proud; arrogant
- Originario: original; primary
- Oriundo: native
- Ornamental: ornamental
- Orondo: chubby; smug
- Osado: daring; bold
- Oscuro: dark
- Ostentoso: ostentatious; showy
- Otoñal: autumnal
- Ovino: ovine; related to sheep
- Oxigenado: oxygenated; bleached (hair)
El artista omaní creó una obra otoñal con líneas onduladas y colores opacos que parecían olvidados en el tiempo. [The Omani artist created an autumnal piece with wavy lines and dull colors that seemed forgotten in time.]
In addition, most proper adjectives are not capitalized in Spanish like in English. For example, “el artista omaní” uses a lowercase O, while its English translation (“the Omani artist”) uses an uppercase O.
Spanish nouns that start with O
These are some Spanish nouns that start with O. When nouns refer to people, they sometimes change grammatical gender (see the nouns marked with the “/a” ending).
- Obelisco: obelisk
- Objetivo: objective; goal
- Objeto: object
- Obligación: obligation
- Obra: work (art, construction, literature)
- Obrero/a: laborer; manual worker
- Obsequio: gift; present
- Observación: observation
- Obsesión: obsession
- Oca: goose
- Ocasión: occasion
- Océano: ocean
- Ocelote: ocelot
- Ocio: leisure; free time
- Octubre: October
- Oculista: eye doctor; optometrist
- Ocupación: occupation; job
- Oeste: west
- Oferta: offer
- Oficina: office
- Oficinista: office worker; clerical worker
- Oftalmólogo/a: ophthalmologist
- Oído: ear; sense of hearing
- Ojo: eye
- Ola: wave
- Oliva: olive
- Olla: pot
- Oman: Oman
- Ombligo: navel
- Opción: option
- Operador/a: operator; cameraperson
- Opinión: opinion
- Oponente: opponent
- Oportunidad: opportunity
- Oportunismo: opportunism
- Optometrista: optometrist
- Oración: prayer; sentence (syntax)
- Orador/a: public speaker; orator
- Orden: order; command
- Ordenador: computer
- Organismo: organism
- Organización: organization
- Organizador/a: organizer
- Origen: origin
- Orilla: shore; riverbank; edge
- Ornitólogo/a: ornithologist (person who studies birds)
- Oro: gold
- Orquesta: orchestra
- Oruga: caterpillar
- Oso: bear
- Oveja: sheep
- Ovni: UFO (unidentified flying object)
Durante la observación del ornitólogo en la orilla del océano, una ola arrastró su cuaderno con notas sobre la oca. [During the ornithologist’s observation at the ocean’s shore, a wave swept away his notebook with notes about the goose.]
Spanish verbs that start with O
Some Spanish verbs that start with O are:
- Obedecer: to obey
- Obligar: to force; to oblige
- Observar: to observe
- Obstruir: to obstruct; to block
- Obtener: to obtain; to get
- Ocasionar: to cause; to bring about
- Ocultar: to hide; to conceal
- Ocurrir: to occur; to happen
- Odiar: to hate
- Ofender: to offend
- Ofrecer: to offer
- Oír: to hear
- Oler: to smell
- Olvidar: to forget
- Omitir: to omit; to leave out
- Opacar: to darken; to overshadow
- Operar: to operate; to trade
- Opinar: to give an opinion
- Oponer: to oppose
- Optar: to choose; to opt
- Orar: to pray; to orate
- Organizar: to organize
- Orientar: to orient; to guide
- Originar: to originate; to cause
- Oscurecer: to darken; to become dark
- Ostentar: to hold or occupy; to show off; to flaunt
- Otorgar: to grant; to award
- Ovacionar: to cheer; to give an ovation
- Oxidar: to oxidize; to rust
Decidió optar por el silencio para no ofender a nadie, aunque en su interior no podía dejar de odiar la situación ni de opinar mentalmente sobre cada detalle. [He decided to opt for silence so as not to offend anyone, although inside he couldn’t stop hating the situation or mentally forming opinions about every detail.]
Other Spanish words that start with O
Some Spanish adverbs that start with O are:
- Obedientemente: obediently
- Obligatoriamente: obligatorily; compulsorily
- Obstinadamente: stubbornly; obstinately
- Obviamente: obviously
- Ocasionalmente: occasionally
- Ociosamente: idly; lazily
- Ofensivamente: offensively
- Oficialmente: officially
- Oportunamente: opportunely; timely
- Ordenadamente: orderly; neatly
- Orgullosamente: proudly
- Originalmente: originally
One very common Spanish coordinating conjunction that starts with O is o (or).
There are also two common Spanish expressions that start with O:
- Ojalá: hopefully; I wish; if only
- O sea: I mean; or rather; in other words
There are also some Spanish pronouns that start with O:
- Otro/a: another; one more; the other one (indefinite pronoun)
- Os: you all (direct object pronoun in Spanish); to/for you all (indirect object pronoun)
As a note, the pronoun os is the plural, informal way to say “you,” and while very common in Spain, it is not typically used in the rest of the Spanish-speaking world.
If you have questions about these Spanish words that start with O, you can ask QuillBot’s AI Chat.
Spanish words with other letters
If you’re looking for Spanish words that start with another letter, you can visit one of our other articles.
| Spanish words with A | Spanish words with F | Spanish words with K | Spanish words with Q | Spanish words with V |
| Spanish words with B | Spanish words with G | Spanish words with L | Spanish words with R | Spanish words with W |
| Spanish words with C | Spanish words with H | Spanish words with M | Spanish words with S | Spanish words with X |
| Spanish words with D | Spanish words with I | Spanish words with N | Spanish words with T | Spanish words with Y |
| Spanish words with E | Spanish words with J | Spanish words with P | Spanish words with U | Spanish words with Z |
