plunderer

from WordNet (r) 3.0 (2006)

plunderer
    n 1: someone who takes spoils or plunder (as in war) [syn:
         {plunderer}, {pillager}, {looter}, {spoiler}, {despoiler},
         {raider}, {freebooter}]

from The Collaborative International Dictionary of English v.0.48

Plunderer \Plun"der*er\, n.
   One who plunders or pillages.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "plunderer":
      depredator, despoiler, forager, forayer, freebooter, looter,
      marauder, pillager, raider, rapparee, ravager, ravisher, reiver,
      rifler, sacker, spoiler, spoliator, wrecker

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