adult vs animate being

adult and animate being both are nouns.

Word	Noun	Adjective	Verb	Adverb
adult	Yes	Yes	No	No
animate being	Yes	No	No	No

As nouns, animate being is a hypernym of adult; that is, animate being is a word with a broader meaning than adult:

Other hypernyms of adult include animal, beast, brute, creature, fauna.

adult (noun)	animate being (noun)
any mature animal	a living organism characterized by voluntary movement
a fully developed person from maturity onward

adult (adjective)	animate being (adjective)
(of animals) fully developed
designed to arouse lust