Aegisthus vs Greek mythology

Aegisthus and Greek mythology both are nouns.

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

Aegisthus (noun)	Greek mythology (noun)
(Greek mythology) the seducer of Clytemnestra and murderer of Agamemnon who usurped the throne of Mycenae until Agamemnon's son Orestes returned home and killed him	the mythology of the ancient Greeks