# CMOS vs CoC

> English confusable word pair

## The two words

### CMOS
*noun · IPA /ˈsiːmɒs/ · frequency rank #31,112*
Initialism of complementary metal–oxide–semiconductor.

### CoC
*noun · IPA /siː oʊ siː/ · frequency rank #40,621*
Initialism of certificate of conformance.

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