# flex vs fuel

> English confusable word pair

## The two words

### flex
*noun · IPA /flɛks/ · frequency rank #10,696*
Flexibility, pliancy.

### fuel
*noun · IPA /ˈfjuːəl/ · frequency rank #1,942*
Substance consumed to provide energy through combustion, or through chemical or nuclear reaction.

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