Source : Webster's Revised Unabridged Dictionary (1913)

Amass \A*mass"\, v. t. [imp. & p. p. {Amassed}; p. pr. & vb. n.
   {Amassing}.] [F. ambusher, LL. amassare; L. ad + massa lump,
   mass. See {Mass}.]
   To collect into a mass or heap; to gather a great quantity
   of; to accumulate; as, to amass a treasure or a fortune; to
   amass words or phrases.

         The life Homer has been written by amassing all the
         traditions and hints the writers could meet with.
                                                  --Pope.

   Syn: To accumulate; heap up; pile.

Source : WordNet®

amassed
     adj : brought together into a group or crowd; "the accumulated
           letters in my office" [syn: {accumulated}, {assembled},
            {collected}, {congregate}, {massed}]