# FOSS vs FTSE

> English confusable word pair

## The two words

### FOSS
*noun · IPA /fɒs/ · frequency rank #33,655*
Initialism of Free and Open Source Software.

### FTSE
*name · IPA /ˈfʊt.si/ · frequency rank #38,851*
Financial Times and Stock Exchange.

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