admirer vs champion

admirer and champion both are nouns.

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

As nouns, admirer and champion are synonyms defined as:

Other synonyms of admirer include booster, friend, protagonist, supporter.

admirer (noun)	champion (noun)
someone who admires a young woman	someone who fights for a cause
a person who backs a politician or a team etc.	someone who has won first place in a competition
a person who admires; someone who esteems or respects or approves	a person who backs a politician or a team etc.
	someone who is dazzlingly skilled in any field

admirer (adjective)	champion (adjective)
	holding first place in a contest

admirer (verb)	champion (verb)
	protect or fight for as a champion