omnivore vs beast

omnivore and beast both are nouns.

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

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

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

omnivore (noun)	beast (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 cruelly rapacious person