gangland vs mob

gangland and mob both are nouns.

Word	Noun	Adjective	Verb	Adverb
gangland	Yes	No	No	No
mob	Yes	No	Yes	No

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

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

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

gangland (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

gangland (verb)	mob (verb)
	press tightly together or cram