# aback vs ACK

> English confusable word pair

## The two words

### aback
*adverb · IPA /əˈbæk/ · frequency rank #29,152*
Towards the back or rear; backwards.

### ACK
*verb · frequency rank #33,924*
To acknowledge a packet or a message received from a network.

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