polecat vs musteline

polecat and musteline both are nouns.

Word	Noun	Adjective	Verb	Adverb
polecat	Yes	No	No	No
musteline	Yes	No	No	No

As nouns, musteline is a hypernym of polecat; that is, musteline is a word with a broader meaning than polecat:

polecat: dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened
musteline: fissiped fur-bearing carnivorous mammals

Other hypernyms of polecat include mustelid, musteline mammal.

As nouns, musteline is a hypernym of polecat; that is, musteline is a word with a broader meaning than polecat:

polecat: American musteline mammal typically ejecting an intensely malodorous fluid when startled; in some classifications put in a separate subfamily Mephitinae
musteline: fissiped fur-bearing carnivorous mammals

Other hypernyms of polecat include mustelid, musteline mammal.

polecat (noun)	musteline (noun)
dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened	fissiped fur-bearing carnivorous mammals
American musteline mammal typically ejecting an intensely malodorous fluid when startled; in some classifications put in a separate subfamily Mephitinae