fancy man vs wrongdoer

fancy man and wrongdoer both are nouns.

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

As nouns, wrongdoer is a hypernym of fancy man; that is, wrongdoer is a word with a broader meaning than fancy man:

fancy man: someone who procures customers for whores (in England they call a pimp a ponce)
wrongdoer: a person who transgresses moral or civil law

Other hypernyms of fancy man include offender.

fancy man (noun)	wrongdoer (noun)
someone who procures customers for whores (in England they call a pimp a ponce)	a person who transgresses moral or civil law
a woman's lover