# case vs cyst

> English confusable word pair

## The two words

### case
*noun · IPA /keɪs/ · frequency rank #255*
An actual event, situation, or fact.

### cyst
*noun · IPA /sɪst/ · frequency rank #24,720*
A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.

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