# on vs op

> English confusable word pair

## The two words

### on
*adjective · IPA /ɒn/ · frequency rank #13*
In the state of being active, functioning or operating.

### op
*noun · IPA /ɒp/ · frequency rank #3,516*
Clipping of opponent.

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