proletariat
commonalty, commoners, hoi polloi, labouring classes, lower classes, lower orders, plebs, proles (derogatory slang, chiefly Brit.) the common people, the great unwashed (informal & derogatory) the herd, the masses, the rabble, wage-earners, working class
Antonyms
aristo (informal) aristocracy, gentry, nobility, peerage, ruling class, upper class, upper crust (informal)