# acid vs AD

> English confusable word pair

## The two words

### acid
*adjective · IPA /ˈæsɪd/ · frequency rank #3,272*
Sour, sharp, or biting to the taste; tart; having the taste of vinegar.

### AD
*adverb · IPA /ˌeɪˈdi/ · frequency rank #1,779*
Initialism of Anno Domini (borrowed from Latin); in the year of our Lord.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-02.
Canonical page: https://plainspell.com/en/vs/acid-vs-ad