heroism vs valorousness

heroism and valorousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
heroism	Yes	No	No	No
valorousness	Yes	No	No	No

As nouns, heroism and valorousness are synonyms defined as:

heroism and valorousness: the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle)

Other synonyms of heroism include gallantry, valiance, valiancy, valor, valour.

heroism (noun)	valorousness (noun)
the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle)	the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle)