# choo vs co

> English confusable word pair

## The two words

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

### co
*noun · IPA /kəʊ/ · frequency rank #617*
Clipping of company.

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