# illness vs illnesses

> English confusable word pair

## The two words

### illness
*noun · IPA /ˈɪl.nəs/ · frequency rank #3,563*
An instance of a disease or poor health.

### illnesses
*noun · IPA /ˈɪl.nəsɪz/ · frequency rank #11,723*
plural of illness

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