courageous vs stalwart

courageous is not a noun while stalwart is a noun.

Word	Noun	Adjective	Verb	Adverb
courageous	No	Yes	No	No
stalwart	Yes	Yes	No	No

courageous (noun)	stalwart (noun)
	a person who is loyal to their allegiance (especially in times of revolt)

courageous (adjective)	stalwart (adjective)
possessing or displaying courage; able to face and deal with danger or fear without flinching	used especially of persons
	dependable
	having rugged physical strength; inured to fatigue or hardships