# flak vs foam

> English confusable word pair

## The two words

### flak
*noun · IPA /flæk/ · frequency rank #26,792*
Ground-based anti-aircraft guns firing explosive shells.

### foam
*noun · IPA /foʊm/ · frequency rank #9,898*
A substance composed of a large collection of bubbles or their solidified remains, especially

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