# which vs while

> English confusable word pair

## The two words

### which
*conjunction · IPA /wɪt͡ʃ/ · frequency rank #59*
And.

### while
*noun · IPA /ʍaɪl/ · frequency rank #144*
An uncertain duration of time, a period of time.

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