unusual person vs giant

unusual person and giant both are nouns.

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

As nouns, giant is a hyponym of unusual person; that is, giant is a word with a more specific, narrower meaning than unusual person:

Other hyponyms of unusual person include aberrant, behemoth, colossus, goliath, monster, Jekyll and Hyde.

unusual person (noun)	giant (noun)
a person who is unusual	any creature of exceptional 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

unusual person (adjective)	giant (adjective)
	of great mass; huge and bulky