organized crime vs mob

organized crime and mob both are nouns.

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

As nouns, mob is a hyponym of organized crime; that is, mob is a word with a more specific, narrower meaning than organized crime:

organized crime: underworld organizations
mob: a loose affiliation of gangsters in charge of organized criminal activities

Other hyponyms of organized crime include yakuza, Maffia, Mafia, Sicilian Mafia, Black Hand, Camorra, crime syndicate, family, syndicate.

organized crime (noun)	mob (noun)
underworld organizations	a disorderly crowd of people
	an association of criminals
	a loose affiliation of gangsters in charge of organized criminal activities

organized crime (verb)	mob (verb)
	press tightly together or cram