Pandora's box vs Greek mythology

Pandora's box and Greek mythology both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pandora's box	Yes	No	No	No
Greek mythology	Yes	No	No	No

Pandora's box (noun)	Greek mythology (noun)
(Greek mythology) a box that Zeus gave to Pandora with instructions that she not open it; she gave in to her curiosity and opened it; all the miseries and evils flew out to afflict mankind	the mythology of the ancient Greeks