discoverer vs Hero

discoverer and Hero both are nouns.

Word	Noun	Adjective	Verb	Adverb
discoverer	Yes	No	No	No
Hero	Yes	No	No	No

discoverer (noun)	Hero (noun)
someone who is the first to observe something	(Greek mythology) priestess of Aphrodite who killed herself when her lover Leander drowned while trying to swim the Hellespont to see her
someone who is the first to think of or make something	Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)