Hephaestus vs Greek mythology

Hephaestus and Greek mythology both are nouns.

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

Hephaestus (noun)	Greek mythology (noun)
(Greek mythology) the lame god of fire and metalworking in ancient mythology; identified with Roman Vulcan	the mythology of the ancient Greeks