# AU vs aud

> English confusable word pair

## The two words

### AU
*noun · frequency rank #6,867*
Initialism of alopecia universalis.

### aud
*adjective · IPA /əʊd/ · frequency rank #23,464*
Alternative form of auld.

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