giant vs beast

giant and beast both are nouns.

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

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

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

giant (noun)	beast (noun)
any creature of exceptional size	a living organism characterized by voluntary movement
an unusually large enterprise	a cruelly rapacious person
a very bright star of large diameter and low density (relative to the Sun)
someone that is abnormally large and powerful
a person of exceptional importance and reputation
an imaginary figure of superhuman size and strength; appears in folklore and fairy tales
a very large person; impressive in size or qualities

giant (adjective)	beast (adjective)
of great mass; huge and bulky