Gangs, noun plural of gang. Synonyms in the same form.
Crew
crews, cliques, squads, parties, bands, troops, cabals, companies, sets
Bunch
bunches, groups, crowds, circles, lots, knots
Mob
mobs, packs, rings
Other
clans, numbers, massives, matrixes, outhouses, corteges, veinstones
All synonyms for gang →