Erebus vs Greek mythology

Erebus and Greek mythology both are nouns.

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

Erebus (noun)	Greek mythology (noun)
(Greek mythology) Greek god of darkness who dwelt in the underworld; son of Chaos; brother of Nox; father of Aether and Day	the mythology of the ancient Greeks