sturdy vs stalwart

sturdy is not a noun while stalwart is a noun.

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

As adjectives, sturdy and stalwart are synonyms defined as:

sturdy and stalwart: having rugged physical strength; inured to fatigue or hardships

Other synonyms of sturdy include hardy, stout.

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

sturdy (adjective)	stalwart (adjective)
not making concessions	used especially of persons
having rugged physical strength; inured to fatigue or hardships	dependable
substantially made or constructed	having rugged physical strength; inured to fatigue or hardships