pile

pile up

verb

Definition of PILE

to gradually form into a layer, pile, or mass <snow piling up in the driveway at a rapid pace>

Synonyms accrete, accumulate, amass, build up, concentrate, conglomerate, gather, mass, pile (up), stack (up)

Related Words agglutinate, clump, lump; bank, drift, ridge

Near Antonyms disperse, dissipate, scatter