# aff vs ai

> English confusable word pair

## The two words

### aff
*noun · IPA /æf/ · frequency rank #31,048*
Clipping of affirmation.

### 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: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/aff-vs-ai