mutant vs creature

mutant and creature both are nouns.

Word	Noun	Adjective	Verb	Adverb
mutant	Yes	Yes	No	No
creature	Yes	No	No	No

As nouns, creature is a hypernym of mutant; that is, creature is a word with a broader meaning than mutant:

Other hypernyms of mutant include animal, animate being, beast, brute, fauna.

mutant (noun)	creature (noun)
an animal that has undergone mutation	a living organism characterized by voluntary movement
(biology) an organism that has characteristics resulting from chromosomal alteration	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else

mutant (adjective)	creature (adjective)
tending to undergo or resulting from mutation