# only vs onus

> English confusable word pair

## The two words

### only
*adjective · IPA /ˈəʊn.li/ · frequency rank #79*
Alone in a category.

### onus
*noun · IPA /ˈəʊnəs/ · frequency rank #29,402*
A legal obligation.

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