omnivore vs creature

omnivore and creature both are nouns.

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

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

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

omnivore (noun)	creature (noun)
an animal that feeds on both animal and vegetable substances	a living organism characterized by voluntary movement
a person who eats all kinds of foods	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else