# once vs oni

> English confusable word pair

## The two words

### once
*adverb · IPA /wʌn(t)s/ · frequency rank #275*
One and only one time.

### oni
*noun · IPA /ˈəʊni/ · frequency rank #36,267*
A Japanese evil spirit or demon.

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