musteline mammal vs mustelid

musteline mammal and mustelid both are nouns.

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

As nouns, musteline mammal and mustelid are synonyms defined as:

Other synonyms of musteline mammal include musteline.

musteline mammal (noun)	mustelid (noun)
fissiped fur-bearing carnivorous mammals	fissiped fur-bearing carnivorous mammals