lover vs aficionado

lover and aficionado both are nouns.

Word	Noun	Adjective	Verb	Adverb
lover	Yes	No	No	No
aficionado	Yes	No	No	No

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

lover: an ardent follower and admirer
aficionado: a serious devotee of some particular music genre or musical performer

lover (noun)	aficionado (noun)
a person who loves someone or is loved by someone	a serious devotee of some particular music genre or musical performer
an ardent follower and admirer	a fan of bull fighting
a significant other to whom you are not related by marriage