# CST vs cup

> French confusable word pair

## The two words

### CST
*noun · IPA \se.ɛs.te\ · frequency rank #34,048*
Cellule souche tumorale.

### cup
*noun · IPA \kœp\ · frequency rank #8,225*
Cup menstruelle.

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