giant vs large person

giant and large person both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant	Yes	Yes	No	No
large person	Yes	No	No	No

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

giant (noun)	large person (noun)
any creature of exceptional size	a person of greater than average size
an unusually large enterprise
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)	large person (adjective)
of great mass; huge and bulky