# a1 vs AP

> English confusable word pair

## The two words

### a1
*adjective · frequency rank #12,173*
first rate or excellent

### AP
*adjective · frequency rank #3,600*
Initialism of all-purpose.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/vs/a1-vs-ap