spirit animal vs creature

spirit animal and creature both are nouns.

Word	Noun	Adjective	Verb	Adverb
spirit animal	Yes	No	No	No
creature	Yes	No	No	No

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

spirit animal: An animal whose characteristics match a part of a person's behavior
creature: a living organism characterized by voluntary movement

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

spirit animal (noun)	creature (noun)
An animal whose characteristics match a part of a person's behavior	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