# ch vs CU

> English confusable word pair

## The two words

### ch
*noun · frequency rank #7,659*
Abbreviation of chain (“a unit of measurement equal to 22 yards”).

### CU
*noun · frequency rank #13,895*
Initialism of control unit.

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