Hero vs discoverer

Hero and discoverer both are nouns.

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

Hero (noun)	discoverer (noun)
(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 observe something
Greek mathematician and inventor who devised a way to determine the area of a triangle and who described various mechanical devices (first century)	someone who is the first to think of or make something