[1] : The Collaborative International Dictionary of English v.0.48

trounce \trounce\, v. t. imp.  p. p. trounced; p. pr.  vb.
   n. trouncing. f. tronce, tronche, a stump, piece of wood.
   see truncheon.
   to punish or beat severely; to whip smartly; to flog; to
   castigate. colloq.
   1913 webster
see also:
trounced trouncing truncheon 

[2] : WordNet (r) 2.0

trounce
     v 1: beat severely with a whip or rod; "the teacher often flogged
          the students"; "the children were severely trounced"
          syn: flog, welt, whip, lather, lash, slash,
           strap
     2: come out better in a competition, race, or conflict; "agassi
        beat becker in the tennis championship"; "we beat the
        competition"; "harvard defeated yale in the last football
        game" syn: beat, beat out, crush, shell, vanquish
     3: censure severely or angrily; "the mother scolded the child
        for entering a stranger's car"; "the deputy ragged the
        prime minister"; "the customer dressed down the waiter for
        bringing cold soup" syn: call on the carpet, rebuke,
        rag, reproof, lecture, reprimand, jaw, dress
        down, call down, scold, chide, berate, bawl out,
         remonstrate, chew out, chew up, have words, lambaste,
         lambast
see also:
flog welt whip lather lash slash 
strap beat beat out crush shell 
vanquish call on the carpet rebuke rag reproof 
lecture reprimand jaw dress down call down 
scold chide berate bawl out remonstrate 
chew out chew up have words lambaste lambast 

[3] : Moby Thesaurus II by Grady Ward, 1.0

92 moby thesaurus words for "trounce":
   assail, attack, baste, bastinado, bear the palm, beat,
   beat all hollow, beat hollow, belabor, belt, best, birch, blister,
   buffet, cane, castigate, clobber, club, cowhide, cudgel, cut,
   defeat, destroy, do in, drub, excoriate, fix, flagellate, flail,
   flay, flog, fustigate, give a whipping, give the stick, hide,
   hors de combat, horsewhip, knout, lace, lambaste, lash, lather,
   lay on, lick, outclass, outdo, outfight, outgeneral, outmaneuver,
   outpoint, outrun, outsail, outshine, overwhelm, pistol-whip,
   pommel, pummel, put, rawhide, roast, ruin, scarify, scathe, scorch,
   scourge, settle, shellac, skin, skin alive, slash, smite, spank,
   strap, stripe, swinge, switch, take the cake, thrash, thump, trim,
   triumph, triumph over, truncheon, undo, walk all over, wallop,
   whale, whip, whomp, whop, win, worst

Trounce >> T Words
Trounce, definition of term: Trounce
trounce_pag1.html