# Ac vs aF

> German confusable word pair

## The two words

### Ac
*abbrev · frequency rank #6,033*
chemisches Zeichen für Actinium

### aF
*abbrev · IPA […] · frequency rank #13,997*
Abkürzung für alte Fassung

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