admirer vs fancier

admirer and fancier both are nouns.

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

As nouns, fancier is a hyponym of admirer; that is, fancier is a word with a more specific, narrower meaning than admirer:

Other hyponyms of admirer include enthusiast, suer, suitor, wooer, worshiper, worshipper.

admirer (noun)	fancier (noun)
someone who admires a young woman	a person having a strong liking for something
a person who backs a politician or a team etc.
a person who admires; someone who esteems or respects or approves