# aff vs APL

> English confusable word pair

## The two words

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

### APL
*noun · frequency rank #48,593*
Initialism of acute promyelocytic leukemia.

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