captive vs beast

captive and beast both are nouns.

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

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

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

captive (noun)	beast (noun)
an animal that is confined	a living organism characterized by voluntary movement
a person who is confined; especially a prisoner of war	a cruelly rapacious person
a person held in the grip of a strong emotion or passion

captive (adjective)	beast (adjective)
giving or marked by complete attention to
being in captivity