naiad vs Greek mythology

naiad and Greek mythology both are nouns.

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

naiad (noun)	Greek mythology (noun)
(Greek mythology) a nymph of lakes and springs and rivers and fountains	the mythology of the ancient Greeks
submerged aquatic plant having narrow leaves and small flowers; of fresh or brackish water