goliath vs giant

goliath and giant both are nouns.

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

As nouns, goliath and giant are synonyms defined as:

Other synonyms of goliath include behemoth, colossus, monster.

goliath (noun)	giant (noun)
someone that is abnormally large and powerful	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

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