# fluoride vs fluorine

> English confusable word pair

## The two words

### fluoride
*noun · IPA /ˈflʊəˌɹaɪd/ · frequency rank #20,929*
A binary compound of fluorine and another element or radical.

### fluorine
*noun · IPA /ˈflʊ(ə)ɹˌin · frequency rank #41,631*
The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

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