# choo vs coos

> English confusable word pair

## The two words

### choo
*noun · IPA /tʃuː/ · frequency rank #20,061*
The sound of a locomotive whistle.

### coos
*verb · IPA /kuːz/ · frequency rank #39,755*
third-person singular simple present indicative of coo

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