valorousness vs gallantry

valorousness and gallantry both are nouns.

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

As nouns, valorousness and gallantry are synonyms defined as:

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

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

valorousness (noun)	gallantry (noun)
the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle)	polite attentiveness to women
	the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle)
	courtesy towards women