# APL vs auld

> English confusable word pair

## The two words

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

### auld
*adjective · IPA /oʊld/ · frequency rank #31,071*
Old.

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