# IH vs ill

> English confusable word pair

## The two words

### IH
*noun · frequency rank #35,767*
Initialism of industrial hygiene.

### ill
*adjective · IPA /ɪl/ · frequency rank #1,946*
Evil; wicked (of people).

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