mafioso vs felon

mafioso and felon both are nouns.

Word	Noun	Adjective	Verb	Adverb
mafioso	Yes	No	No	No
felon	Yes	No	No	No

As nouns, felon is a hypernym of mafioso; that is, felon is a word with a broader meaning than mafioso:

mafioso: a member of the Mafia crime syndicate in the United States
felon: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of mafioso include criminal, crook, malefactor, outlaw.

mafioso (noun)	felon (noun)
a member of the Mafia crime syndicate in the United States	someone who has committed a crime or has been legally convicted of a crime
a member of the Sicilian Mafia	a purulent infection at the end of a finger or toe in the area surrounding the nail