animal fancier vs enthusiast

animal fancier and enthusiast both are nouns.

Word	Noun	Adjective	Verb	Adverb
animal fancier	Yes	No	No	No
enthusiast	Yes	No	No	No

As nouns, enthusiast is a hypernym of animal fancier; that is, enthusiast is a word with a broader meaning than animal fancier:

Other hypernyms of animal fancier include fancier.

animal fancier (noun)	enthusiast (noun)
a person who owns, shows, judges, or breeds animals	an ardent and enthusiastic supporter of some person or activity
	a person having a strong liking for something