# CFS

> English word · Noun · frequency rank #26,716

## Definitions
1. Initialism of chronic fatigue syndrome.
2. Initialism of cramp fasciculation syndrome.
3. Initialism of Canada Flight Supplement (a pilot's guide to aerodromes, air control zones, and airways in Canadian airspace and Canadian air traffic control zones).

## Easily confused with
- **co** (https://plainspell.com/en/vs/cfs-vs-co)
- **CM** (https://plainspell.com/en/vs/cfs-vs-cm)
- **CT** (https://plainspell.com/en/vs/cfs-vs-ct)
- **CR** (https://plainspell.com/en/vs/cfs-vs-cr)
- **ch** (https://plainspell.com/en/vs/cfs-vs-ch)
- **cs** (https://plainspell.com/en/vs/cfs-vs-cs)
- **Cl** (https://plainspell.com/en/vs/cfs-vs-cl)
- **cp** (https://plainspell.com/en/vs/cfs-vs-cp)
- **CV** (https://plainspell.com/en/vs/cfs-vs-cv)
- **CU** (https://plainspell.com/en/vs/cfs-vs-cu)
- **CW** (https://plainspell.com/en/vs/cfs-vs-cw)
- **ci** (https://plainspell.com/en/vs/cfs-vs-ci)
- **CJ** (https://plainspell.com/en/vs/cfs-vs-cj)
- **CG** (https://plainspell.com/en/vs/cfs-vs-cg)
- **CX** (https://plainspell.com/en/vs/cfs-vs-cx)
- **cz** (https://plainspell.com/en/vs/cfs-vs-cz)
- **CQ** (https://plainspell.com/en/vs/cfs-vs-cq)
- **cut** (https://plainspell.com/en/vs/cfs-vs-cut)
- **cup** (https://plainspell.com/en/vs/cfs-vs-cup)
- **cry** (https://plainspell.com/en/vs/cfs-vs-cry)

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