stalwart vs admirer

stalwart and admirer both are nouns.

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

As nouns, admirer is a hypernym of stalwart; that is, admirer is a word with a broader meaning than stalwart:

stalwart: a person who is loyal to their allegiance (especially in times of revolt)
admirer: a person who backs a politician or a team etc.

Other hypernyms of stalwart include booster, champion, friend, protagonist, supporter.

stalwart (noun)	admirer (noun)
a person who is loyal to their allegiance (especially in times of revolt)	someone who admires a young woman
	a person who backs a politician or a team etc.
	a person who admires; someone who esteems or respects or approves

stalwart (adjective)	admirer (adjective)
used especially of persons
dependable
having rugged physical strength; inured to fatigue or hardships