Helios vs Greek mythology

Helios and Greek mythology both are nouns.

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

Helios (noun)	Greek mythology (noun)
(Greek mythology) ancient god of the sun; drove his chariot across the sky each day; identified with Roman Sol	the mythology of the ancient Greeks