Nouns

(n)mob, rabble, routa disorderly crowd of people
(n)syndicate, crime syndicate, mob, familya loose affiliation of gangsters in charge of organized criminal activities
(n)gang, pack, ring, moban association of criminals“police tried to break up the gang”, “a pack of thieves”

Verbs

(v)throng, mob, pack, pile, jampress tightly together or cram“The crowd packed the auditorium”