Niobe vs Greek mythology

Niobe and Greek mythology both are nouns.

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

Niobe (noun)	Greek mythology (noun)
(Greek mythology) the daughter of Tantalus whose boasting about her children provoked Apollo and Artemis to slay them all; Niobe was turned to stone while bewailing her loss	the mythology of the ancient Greeks