WordNet (r) 3.0 (2006):

stamp out
    v 1: end or extinguish by forceful means; "Stamp out poverty!"
         [syn: stamp out, kill]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "stamp out":
   abscind, amputate, annihilate, ban, bar, blow out, bob, choke,
   clip, crop, cull, cut, cut away, cut off, cut out, damp, dock,
   douse, eliminate, enucleate, eradicate, except, excise, exclude,
   exterminate, extinguish, extirpate, isolate, knock off, lop,
   mutilate, nip, out, pare, peel, pick out, prune, put down, put out,
   quash, quell, quench, root out, rule out, set apart, set aside,
   shave, shear, silence, slack, smother, snuff, snuff out, squash,
   squelch, stifle, strangle, strike off, strip, strip off, suffocate,
   suppress, take off, take out, trample out, trample underfoot,
   truncate, wipe out