# ach vs AR

> English confusable word pair

## The two words

### ach
*noun · IPA /æt͡ʃ/ · frequency rank #30,673*
Any of several species of plants, such as smallage, wild celery, parsley.

### AR
*adjective · frequency rank #6,436*
Initialism of autoregressive.

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