metazoan vs creature

metazoan and creature both are nouns.

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

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

metazoan: any animal of the subkingdom Metazoa; all animals except protozoans and sponges
creature: a living organism characterized by voluntary movement

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

metazoan (noun)	creature (noun)
any animal of the subkingdom Metazoa; all animals except protozoans and sponges	a living organism characterized by voluntary movement
	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else