pile up
    v 1: collect or gather; "Journals are accumulating in my
         office"; "The work keeps piling up" [syn: accumulate,
         cumulate, conglomerate, pile up, gather, amass]
    2: arrange into piles or stacks; "She piled up her books in my
       living room" [syn: pile up, heap up, stack up]
    3: get or gather together; "I am accumulating evidence for the
       man's unfaithfulness to his wife"; "She is amassing a lot of
       data for her thesis"; "She rolled up a small fortune" [syn:
       roll up, collect, accumulate, pile up, amass,
       compile, hoard]