# A4 vs ad

> French confusable word pair

## The two words

### A4
*symbol · frequency rank #18,920*
Format de papier de 210 mm × 297 mm.

### ad
*noun · IPA \æd\ · frequency rank #5,098*
Pub, publicité ; réclame.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/fr/vs/a4-vs-ad