admirer vs friend

admirer and friend both are nouns.

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

As nouns, admirer and friend are synonyms defined as:

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

admirer (noun)	friend (noun)
someone who admires a young woman	a person you know well and regard with affection and trust
a person who backs a politician or a team etc.	a person with whom you are acquainted
a person who admires; someone who esteems or respects or approves	an associate who provides cooperation or assistance
	a person who backs a politician or a team etc.