gangster vs outlaw

gangster and outlaw both are nouns.

Word	Noun	Adjective	Verb	Adverb
gangster	Yes	No	No	No
outlaw	Yes	Yes	Yes	No

As nouns, outlaw is a hypernym of gangster; that is, outlaw is a word with a broader meaning than gangster:

gangster: a criminal who is a member of gang
outlaw: someone who has committed a crime or has been legally convicted of a crime

Other hypernyms of gangster include criminal, crook, felon, malefactor.

gangster (noun)	outlaw (noun)
a criminal who is a member of gang	someone who has committed a crime or has been legally convicted of a crime

gangster (adjective)	outlaw (adjective)
	contrary to or forbidden by law
	disobedient to or defiant of law

gangster (verb)	outlaw (verb)
	declare illegal; outlaw