1 aggregation, assemblage, association, band, batch, bevy, bunch, camp, category, circle, class, clique, clump, cluster, collection, company, congregation, coterie, crowd, faction, formation, gang, gathering, organization, pack, party, posse (slang) set, troop
vb
2 arrange, assemble, associate, assort, bracket, class, classify, dispose, gather, marshal, order, organize, put together, range, sort
3 associate, band together, cluster, congregate, consort, fraternize, gather, get together