mink vs Mustela vison

mink and Mustela vison both are nouns.

Word	Noun	Adjective	Verb	Adverb
mink	Yes	No	No	No
Mustela vison	Yes	No	No	No

As nouns, Mustela vison is a hyponym of mink; that is, Mustela vison is a word with a more specific, narrower meaning than mink:

mink: slender-bodied semiaquatic mammal having partially webbed feet; valued for its fur
Mustela vison: usually rich dark brown

Other hyponyms of mink include American mink.

mink (noun)	Mustela vison (noun)
slender-bodied semiaquatic mammal having partially webbed feet; valued for its fur	usually rich dark brown
fur coat made from the soft lustrous fur of minks
the expensive fur of a mink