homotherm vs creature

homotherm and creature both are nouns.

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

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

homotherm: an animal that has a body temperature that is relatively constant and independent of the environmental temperature
creature: a living organism characterized by voluntary movement

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

homotherm (noun)	creature (noun)
an animal that has a body temperature that is relatively constant and independent of the environmental temperature	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