fancier vs maniac

fancier and maniac both are nouns.

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

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

fancier: a person having a strong liking for something
maniac: a person who has an obsession with or excessive enthusiasm for something

Other hyponyms of fancier include animal fancier, bird fancier, technophile.

fancier (noun)	maniac (noun)
a person having a strong liking for something	an insane person
	a person who has an obsession with or excessive enthusiasm for something

fancier (adjective)	maniac (adjective)
	wildly disordered