55 Spanish Words That Start With O: Ultimate List with Letter O + Examples

In this blog post, we’re focusing on Spanish words that start with O. The letter O in Spanish is a vowel that has a consistent pronunciation in Spanish words.

Some Spanish vowels act differently, but instead of explaining this in the blog post, let Mariana from Spring Spanish explain it to you. By the way, Spring Spanish is one of my side-projects which focuses on Spanish language learning: check it out, it has a complex Spanish course!

And now, here are 55 Spanish words that start with the letter O.

1. Fun facts about the Spanish letter ‘O’

The letter O in Spanish is pronounced as a clear, round vowel sound. It’s important to note that unlike in English, the Spanish O doesn’t have a “long” and “short” sound – it’s always pronounced the same way.

spanish words that start with o, a large and bold letter o

Interestingly, many Spanish words that start with O have Latin or Greek origins. This letter often appears in scientific or advanced Spanish phrases.

A common Spanish expression that uses O is “O todo o nada” (All or nothing). It could even be the slogan for a great Spanish commercial!

If you’re interested, we have more articles like this one:

2. Spanish nouns starting with O

SpanishEnglish
OjoEye
OlaWave
OroGold
OsoBear
OrejaEar
OvejaSheep
OllaPot
OcéanoOcean
OtoñoAutumn
OficinaOffice
OrquestaOrchestra
OportunidadOpportunity
OlivoOlive tree
OrigenOrigin
OrdenOrder

Using these Spanish words that start with O could sound like this:

Olivia: Oscar, ¿has visto el nuevo océano documental? Tiene unas olas impresionantes. (Olivia: Oscar, have you seen the new ocean documentary? It has impressive waves.)
Oscar: No, aún no. Estuve ocupado en la oficina. Por cierto, ¿viste el oso en el zoológico? (Oscar: No, not yet. I’ve been busy at the office. By the way, did you see the bear at the zoo?)
Olivia: ¡Sí! Tenía unos ojos tan expresivos. Fue una gran oportunidad para verlo de cerca. (Olivia: Yes! It had such expressive eyes. It was a great opportunity to see it up close.)

3. Spanish verbs starting with O

SpanishEnglish
ObservarTo observe
OírTo hear
OfrecerTo offer
OrganizarTo organize
OlvidarTo forget
ObtenerTo obtain
OpinarTo opine
OcultarTo hide
OcuparTo occupy
OdiarTo hate
OlerTo smell
OrdenarTo order
OrientarTo orient
ObligarTo force
OtorgarTo grant

Let’s see how Spanish verbs with O act in Spanish conversations:

Emma: Pablo, ¿puedes observar si alguien viene mientras organizo esta sorpresa? (Emma: Pablo, can you observe if anyone is coming while I organize this surprise?)
Pablo: Claro, no hay problema. ¿Quieres que ofrezca algo de beber a los invitados cuando lleguen? (Pablo: Sure, no problem. Do you want me to offer something to drink to the guests when they arrive?)
Emma: Sí, por favor. Y no olvides ocultar los regalos. (Emma: Yes, please. And don’t forget to hide the gifts.)

4. Spanish adverbs starting with O

SpanishEnglish
ObviamenteObviously
OcasionalmenteOccasionally
OficialmenteOfficially
OrgullosamenteProudly
OriginalmenteOriginally
OportunamenteOpportunely
OscuramenteObscurely
ObjetivamenteObjectively
OpuestamenteOppositely
OrdenadamenteOrderly

And what about these adverbs used in everyday Spanish events?

Isabel: Hola Raúl, ¿cómo va tu nuevo proyecto? (Isabel: Hi Raúl, how’s your new project going?)
Raúl: Obviamente, es un desafío, pero estoy trabajando en él orgullosamente. (Raúl: Obviously, it’s a challenge, but I’m working on it proudly.)
Isabel: Me alegro. ¿Lo terminarás a tiempo? (Isabel: I’m glad. Will you finish it on time?)
Raúl: Ocasionalmente tengo dudas, pero objetivamente, creo que sí lo lograré. (Raúl: Occasionally I have doubts, but objectively, I think I will achieve it.)

5. Spanish adjectives starting with O

SpanishEnglish
OscuroDark
OcupadoBusy
OriginalOriginal
ObvioObvious
OrgullosoProud
OptimistaOptimistic
OportunoTimely
OrdenadoTidy
ObedienteObedient
OvaladoOval
OficialOfficial
OpuestoOpposite
OrdinarioOrdinary
ÓseoBony
OmnipotenteOmnipotent

Do you want to talk about design or arts in Spanish? Then use these adjectives with Spanish words that start with O:

Laura: ¡Mira ese oscuro edificio, Andrés! Es muy original en su diseño. (Laura: Look at that dark building, Andrés! It’s very original in its design.)
Andrés: Sí, es verdad. Parece ovalado y opuesto a todo lo que hemos visto antes. (Andrés: Yes, that’s true. It looks oval and opposite to everything we’ve seen before.)
Laura: Estoy de acuerdo. Aunque parece un poco ordinario por fuera, la experiencia dentro será oportuna. (Laura: I agree. Although it looks a bit ordinary on the outside, the experience inside will be timely.)

6. Learn Spanish words that start with O with Conversation Based Chunking method

This can sound a bit boring, but we have some good news: Conversation Based Chunking!

What is it? It’s a method that focuses on the natural building blocks of the language. These natural building blocks are called lexical chunks – and instead of memorizing boring vocabulary lists and Spanish grammar rules, you immerse yourself in the language and you learn this way.

In no time, you’ll use common Spanish phrases naturally, like a native speaker would. You don’t even realize but you use these natural building blocks yourself – in your native language. We help you learn everything with this method.

And the best thing about it?

It’s FREE!

The only thing you have to do is to sign up to our email list, and we’ll send you an essential Spanish Chunking List, you’ll have access to our Full Practice Worksheet Library, and you will also see the best resources to learn Spanish!

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