accumulate in WordNet English dictionary

1. collect or gather
   "Journals are accumulating in my office"; "The work keeps piling up"
   accumulate  cumulate  conglomerate  pile up  gather  amass 
   
2. 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"
   roll up  collect  accumulate  pile up  amass  compile  hoard