WordNet sense 1 ((often followed by `of') a large number or amount or extent):

batch, deal, flock, lot, mass, mess, mint, peck, pile, plenty, pot, raft, sight, slew, spate, stack, wad, hatful, mickle, muckle, good deal, great deal, quite a little, tidy sum, whole lot, whole slew

WordNet sense 2 (a collection of objects laid on top of each other):

agglomerate, cumulus, mound, agglomerate, cumulation

WordNet sense 3 (a car that is old and unreliable):

bus, jalopy