# CDU vs cy

> French confusable word pair

## The two words

### CDU
*noun · IPA \se.de.y\ · frequency rank #23,795*
Critère de défaillance unique.

### cy
*adverb · frequency rank #27,395*
Ci.

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