# ATO vs auth

> English confusable word pair

## The two words

### ATO
*noun · frequency rank #34,783*
Acronym of assisted take-off.

### auth
*noun · frequency rank #30,696*
Abbreviation of authentication.

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