# ADR vs alder

> English confusable word pair

## The two words

### ADR
*noun · IPA /eɪ di ˈɑɹ/ · frequency rank #35,173*
Initialism of adverse drug reaction.

### alder
*noun · IPA /ˈɔːldə/ · frequency rank #29,902*
Any of several trees or shrubs of the genus Alnus, belonging to the birch family.

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