conglomerate

1 to come together into one body or place people conglomerated in the downtown streets for an impromptu victory celebration Synonyms cluster, collect, concenter, concentrate, assemble, congregate, convene, converge, forgather (or foregather), gather, meet, rendezvousRelated Words affiliate, ally, associate, band (together), caucus, club, collaborate, confederate, conjoin, consolidate, consort, cooperate, couple, federate, gang up, join, merge, unite; reassemble, reconvene, regather, remeetNear Antonyms depart, leave, take off; disjoin, dissociate, disuniteAntonyms break up, disband, disperse, split (up)

2 to gradually form into a layer, pile, or mass over the years the town's discarded junk conglomerated at the bottom of the river Synonyms accrete, accumulate, amass, build up, concentrate, collect, gather, mass, pile (up), stack (up)Related Words agglutinate, clump, lump; bank, drift, ridgeNear Antonyms disperse, dissipate, scatter