bunches

charmed circles, elites, in-groups

closed shops

clubs, colleges, fellowships, guilds (also gilds), leagues, organizations, societies

camps, factions, sects, sides, tribes

messes, squads

brotherhoods, fraternities, orders, sisterhoods, sodalities, sororities

communes

alliances, blocs, coalitions, confederations, congresses, councils, federations, unions

accumulations, aggregates, aggregations, conglomerations

agglomerations, assortments, hodgepodges, jumbles, miscellanies, mixtures, odds and ends, sundries, varieties

cycles, runs, series, suits

assemblies, collectives, congregations, gatherings, musters, organizations

circles, clans, cliques, coteries, fellowships, gangs, rings, rounds, sets

factions, guilds (also gilds), orders, schools, sects

brigades, crews, outfits, phalanxes (or phalanges), platoons, posses, task forces, teams

alliances, blocs, coalitions, confederacies, confederations, federations, leagues, unions

battalions, squadrons

bevies, broods, coveys

domes

blobs, bumps, dilatations, gibbosities, humps, knobs, knots, knurls, lumps, nubs, obtrusions, puffs, snags, swellings

blocks, pieces, portions, sections

enlargements, escalations, expansions, increases

hills, mounds

epidemics, plagues, rashes

bonanzas, embarrassments, excesses, overabundances, overages, overkills, overmuch, oversupplies, plethoras, redundancies, superabundances, superfluities, surfeits, surpluses

deluges, floods, overflows

armies, bevies, crams, crowds, crushes, droves, flocks, herds, hordes, hosts, legions, mobs, multitudes, presses, scores, seas, swarms, throngs

gazillions, jillions, kazillions, millions (or million), thousands, trillions, zillions