# C4 vs Cf

> German confusable word pair

## The two words

### C4
*abbrev · IPA [t͡seːˈfiːɐ̯] · frequency rank #30,979*
Abkürzung für die Pfadüberdeckung

### 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/c4-vs-cf