# I'd vs IH

> English confusable word pair

## The two words

### I'd
*contraction · IPA /aɪd/ · frequency rank #433*
Contraction of I + had.

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

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