Verbs

(v)roll up, collect, accumulate, pile up, amass, compile, hoardget 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”
(v)accumulate, cumulate, conglomerate, pile up, gather, amassincrease in amount by collecting or gathering“Journals are accumulating in my office”, “The work keeps piling up”