fitch vs musteline mammal

fitch and musteline mammal both are nouns.

Word	Noun	Adjective	Verb	Adverb
fitch	Yes	No	No	No
musteline mammal	Yes	No	No	No

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

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

Other hypernyms of fitch include mustelid, musteline.

fitch (noun)	musteline mammal (noun)
dark brown mustelid of woodlands of Eurasia that gives off an unpleasant odor when threatened	fissiped fur-bearing carnivorous mammals