Orpheus vs Greek mythology

Orpheus and Greek mythology both are nouns.

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

Orpheus (noun)	Greek mythology (noun)
(Greek mythology) a great musician; when his wife Eurydice died he went to Hades to get her back but failed	the mythology of the ancient Greeks