# ser vs Serum

> German confusable word pair

## The two words

### ser
*verb · IPA [sɛ] · frequency rank #16,824*
sein

### Serum
*noun · IPA [ˈzeːʁʊm] · frequency rank #20,407*
Blutserum, ein Bestandteil des Blutes

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