# OOO vs OPI

> English confusable word pair

## The two words

### OOO
*adjective · frequency rank #16,289*
Abbreviation of out of office.

### OPI
*noun · frequency rank #45,558*
Initialism of office of primary interest.

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