Spanish Words Starting with O

This page holds 2,919 Spanish words beginning with O, which makes it the smallest of the five vowels here.

A Wide Spread Behind a Small Total

B leads at about twenty percent, R eighteen, P twelve, and C and F eight each. No branch dominates, but there are fewer entries to divide.

Why O Opens So Few Spanish Words

Latin roots beginning with O were far less common than those starting A or E, and Spanish inherited that imbalance. The letter also carries no productive verb prefix of its own.

What it does carry is OB and OBS, borrowed from Latin, which is why the B branch leads.

OR is the other notable opening, giving ORDEN and ORGANIZAR, though it never became productive the way EN or DES did.

Everyday O Words to Know

OTOÑO, OFICINA, ORDEN, OLVIDAR and OBSERVAR reach four branches and are among the more useful entries for a learner.

• Otoño
• Oficina
• Orden
• Olvidar
• Observar

Reading a Smaller Vowel Page

At under three thousand entries this page is small enough to browse by second letter without filtering further, which is not true of A or E.

Frequently Asked Questions

Why is O so much smaller than A

A works as a preposition and a verb prefix as well as an opening letter. O does none of those, so it has only one source feeding it.

What does the OB prefix mean

It came from Latin carrying a sense of against or towards, and survives in OBSERVAR and OBTENER rather than as a living prefix Spanish still adds to new words.

Is O ever silent in Spanish

No. Every vowel in Spanish is pronounced, which is one of the things that makes the language more predictable to read aloud than English.