# oi vs oo

> English confusable word pair

## The two words

### oi
*intj · IPA /ɔɪ/ · frequency rank #11,081*
Said to get someone's attention; hey.

### oo
*noun · frequency rank #13,572*
(Ω, ω) The Greek letter omega.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/oi-vs-oo