The Collaborative International Dictionary of English v.0.48:

Pounding \Pound"ing\, n.
   1. The act of beating, bruising, or breaking up; a beating.
      [1913 Webster]

   2. A pounded or pulverized substance. [R.] "Covered with the
      poundings of these rocks." --J. S. Blackie.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Pound \Pound\ (pound), v. t. [imp. & p. p. Pounded; p. pr. &
   vb. n. Pounding.] [OE. pounen, AS. punian to bruise. Cf.
   Pun a play on words.]
   1. To strike repeatedly with some heavy instrument; to beat.
      [1913 Webster]

            With cruel blows she pounds her blubbered cheeks.
                                                  --Dryden.
      [1913 Webster]

   2. To comminute and pulverize by beating; to bruise or break
      into fine particles with a pestle or other heavy
      instrument; as, to pound spice or salt.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pounding
    n 1: repeated heavy blows [syn: pounding, buffeting]
    2: an instance of rapid strong pulsation (of the heart); "he
       felt a throbbing in his head" [syn: throb, throbbing,
       pounding]
    3: the act of pounding (delivering repeated heavy blows); "the
       sudden hammer of fists caught him off guard"; "the pounding
       of feet on the hallway" [syn: hammer, pound, hammering,
       pounding]

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "pounding":
   abrasion, atomization, attrition, barrage, beat, beating,
   brecciation, clicking, comminution, crumbling, crushing, detrition,
   disintegration, drum, drum music, drumbeat, drumfire, drumming,
   flutter, fluttering, fragmentation, granulation, granulization,
   grating, grinding, levigation, mashing, palpitant, palpitation,
   paradiddle, patter, pitapat, pitter-patter, pound, powdering,
   pulsation, rat-a-tat, rat-tat, rat-tat-tat, rataplan, rattattoo,
   roll, rub-a-dub, ruff, ruffle, shredding, smashing, spatter,
   spattering, splutter, spluttering, sputter, sputtering, staccato,
   tat-tat, tattoo, throb, throbbing, thrum, thrumming, thumping,
   ticking, tom-tom, trituration