1) Accrue 2) Amass 3) Assemble 4) Be credited with 5) Build up 6) Collect 7) Collect or gather 8) Compile 9) Ensue 10) Gather 11) Gather together 12) Get or gather together 13) Go to 14) Grow 15) Hive away 16) Hoard 17) Increase 18) Lay in 19) Mount up 20) Pile up 21) Put in 22) Roll up 23) Salt away 
• (v. t.) To heap up in a mass; to pile up; to collect or bring together; to amass; as, to accumulate a sum of money. • (v. i.) To grow or increase in quantity or number; to increase greatly. • (a.) Collected; accumulated.
[Verb] To build or mount up.
Broker/analyst recommendation that could mean slightly different things depending on the broker/anal
to amass or collect. when oil and gas migrate into porous formations, the quantity collected is called an accumulation. 
Ac·cu'mu·late (ăk*kū'mu*lāt) intransitive verb To grow or increase in quantity or number; to increase greatly. « Ill fares the land, to hastening ills a prey, Where wealth accumulates , and men decay. Goldsmith. » Ac·cu'mu·late (-lat) adjective [ Latin accumulatus , past participle of accumulare .] Collected; accumulated. Bacon. Ac·cu'mu·late transitive verb [ imperfect & past participle Accumulated ; present participle & verbal noun Accumulating .] [ Latin accumulatus , past participle of accumulare ; ad + cumulare to heap. See 
[v] - collect or gather
cumulate verb collect or gather; `Journals are accumulating in my office`; `The work keeps piling up`
[Literary terms] get or gather together