Greek mythology vs Despoina

Greek mythology and Despoina both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greek mythology	Yes	No	No	No
Despoina	Yes	No	No	No

Greek mythology (noun)	Despoina (noun)
the mythology of the ancient Greeks	(Greek mythology) daughter of Zeus and Demeter; made queen of the underworld by Pluto in ancient mythology; identified with Roman Proserpina