# opa vs ost

> French confusable word pair

## The two words

### opa
*noun · IPA \ˈɔpa\ · frequency rank #31,636*
Science.

### ost
*noun · IPA \ɔst\ · frequency rank #19,617*
ou Armée au Moyen Âge.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/fr/vs/opa-vs-ost