# CFS vs cs

> English confusable word pair

## The two words

### CFS
*noun · frequency rank #26,716*
Initialism of chronic fatigue syndrome.

### cs
*conjunction · frequency rank #8,268*
Abbreviation of 'cause (because).

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