arrange into piles or stacks; "She piled up her books in my living room" Synonym(s):pile up, heap up, stack up
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" Synonym(s):roll up, collect, accumulate, pile up, amass, compile, hoard