'accumulate' definitions:

Definition of 'accumulate'

From: WordNet
verb
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]
verb
Collect or gather; "Journals are accumulating in my office"; "The work keeps piling up" [syn: accumulate, cumulate, conglomerate, pile up, gather, amass]

Synonyms of 'accumulate'

From: Moby Thesaurus