# efficace vs efficaces

> French confusable word pair

## The two words

### efficace
*adjective · IPA \e.fi.kas\ · frequency rank #1,914*
Qui produit son effet.

### efficaces
*adjective · IPA \e.fi.kas\ · frequency rank #5,975*
Pluriel de efficace.

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