Greek deity vs Olympian

Greek deity and Olympian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greek deity	Yes	No	No	No
Olympian	Yes	Yes	No	No

Greek deity (noun)	Olympian (noun)
a deity worshipped by the ancient Greeks	an athlete who participates in the Olympic games
	a classical Greek god after the overthrow of the Titans

Greek deity (adjective)	Olympian (adjective)
	of or pertaining to the greater gods of ancient Greece whose abode was Mount Olympus
	of the region of Olympia in Greece or its inhabitants