lover vs fancy man

lover and fancy man both are nouns.

Word	Noun	Adjective	Verb	Adverb
lover	Yes	No	No	No
fancy man	Yes	No	No	No

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

Other hyponyms of lover include paramour, man, fancy woman, kept woman, mistress.

lover (noun)	fancy man (noun)
a person who loves someone or is loved by someone	someone who procures customers for whores (in England they call a pimp a ponce)
an ardent follower and admirer	a woman's lover
a significant other to whom you are not related by marriage