# ach vs ai

> 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.

### ai
*noun · IPA /ˈɑ.i/ · frequency rank #4,818*
A type of three-toed sloth, Bradypus tridactylus, endemic to forests of southern Venezuela, the Guianas, and northern Brazil.

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