# CIP vs cos

> English confusable word pair

## The two words

### CIP
*noun · frequency rank #46,378*
Initialism of common isochronous packet.

### cos
*noun · IPA /kɑs/ · frequency rank #6,553*
Synonym of romaine lettuce, a long-leaved variety of lettuce.

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