Maffia vs organized crime

Maffia and organized crime both are nouns.

Word	Noun	Adjective	Verb	Adverb
Maffia	Yes	No	No	No
organized crime	Yes	No	No	No

As nouns, organized crime is a hypernym of Maffia; that is, organized crime is a word with a broader meaning than Maffia:

Maffia: a secret terrorist group in Sicily; originally opposed tyranny but evolved into a criminal organization in the middle of the 19th century
organized crime: underworld organizations

Other hypernyms of Maffia include gangdom, gangland.

Maffia (noun)	organized crime (noun)
a crime syndicate in the United States; organized in families; believed to have important relations to the Sicilian Mafia	underworld organizations
a secret terrorist group in Sicily; originally opposed tyranny but evolved into a criminal organization in the middle of the 19th century