giant vs colossus

giant and colossus both are nouns.

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

As nouns, giant and colossus are synonyms defined as:

Other synonyms of giant include behemoth, goliath, monster.

As nouns, giant and colossus are synonyms defined as:

Other synonyms of giant include behemoth, heavyweight, titan.

giant (noun)	colossus (noun)
any creature of exceptional size	someone that is abnormally large and powerful
an unusually large enterprise	a person of exceptional importance and reputation
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)	colossus (adjective)
of great mass; huge and bulky