# OA vs ob

> English confusable word pair

## The two words

### OA
*adjective · frequency rank #22,753*
Initialism of overacting.

### ob
*noun · IPA /ɒb/ · frequency rank #16,547*
a halfpenny

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/oa-vs-ob