crime syndicate vs gangland

crime syndicate and gangland both are nouns.

Word	Noun	Adjective	Verb	Adverb
crime syndicate	Yes	No	No	No
gangland	Yes	No	No	No

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

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

Other hypernyms of crime syndicate include gangdom, organized crime.

crime syndicate (noun)	gangland (noun)
a loose affiliation of gangsters in charge of organized criminal activities	underworld organizations