# anus vs AU

> English confusable word pair

## The two words

### anus
*noun · IPA /ˈeɪ.nəs/ · frequency rank #20,835*
The external orifice of the rectum in most mammals, teleost fish, and many invertebrates, through which feces and flatus are ejected.

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

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