# fluo vs foo

> French confusable word pair

## The two words

### fluo
*adjective · IPA \fly.o\ · frequency rank #22,270*
Fluorescent.

### foo
*noun · IPA \fu\ · frequency rank #43,447*
Variable métasyntaxique en programmation informatique.

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