sykekassene is the feminine plural definite of sykekasse.

sykekasseN

Kven

sairaskassaN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:63937Edit on GitHub Suggest

Case	Sg	Pl
Indef	sykekasse	sykekasser
Def	sykekassen / sykekassa	sykekassene