# C1 vs Cf

> German confusable word pair

## The two words

### C1
*noun · IPA [t͡seːˈaɪ̯ns] · frequency rank #20,203*
Abkürzung für die Entscheidungsüberdeckung

### Cf
*abbrev · frequency rank #23,463*
Californium

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/de/vs/c1-vs-cf