gangdom vs mob

gangdom and mob both are nouns.

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

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

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

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

gangdom (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

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