biskoper is the masculine plural indefinite of biskop.

biskopN

Kven

pispaN; piispaN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:56952Edit on GitHub Suggest

bismaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:23081Edit on GitHub Suggest

Case	Sg	Pl
Indef	biskop	biskoper
Def	biskopen	biskopene