gang vs crowd

gang and crowd both are nouns.

Word	Noun	Adjective	Verb	Adverb
gang	Yes	No	Yes	No
crowd	Yes	No	Yes	No

As nouns, gang and crowd are synonyms defined as:

Other synonyms of gang include bunch, crew.

gang (noun)	crowd (noun)
tool consisting of a combination of implements arranged to work together	a large number of things or people considered together
an organized group of workmen	an informal body of friends
an association of criminals
an informal body of friends

gang (verb)	crowd (verb)
act as an organized group	to gather together in large numbers
	cause to herd, drive, or crowd together
	approach a certain age or speed
	fill or occupy to the point of overflowing