mutant vs monstrosity

mutant and monstrosity both are nouns.

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

As nouns, monstrosity is a hyponym of mutant; that is, monstrosity is a word with a more specific, narrower meaning than mutant:

mutant: (biology) an organism that has characteristics resulting from chromosomal alteration
monstrosity: a person or animal that is markedly unusual or deformed

Other hyponyms of mutant include freak, lusus naturae, monster.

mutant (noun)	monstrosity (noun)
an animal that has undergone mutation	something hideous or frightful
(biology) an organism that has characteristics resulting from chromosomal alteration	a person or animal that is markedly unusual or deformed

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