herbivore vs creature

herbivore and creature both are nouns.

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

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

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

herbivore (noun)	creature (noun)
any animal that feeds chiefly on grass and other plants	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