The Collaborative International Dictionary of English v.0.48:
despoiler \de*spoil"er\, n. One who despoils. [1913 Webster]WordNet (r) 3.0 (2006):
despoiler n 1: someone who takes spoils or plunder (as in war) [syn: plunderer, pillager, looter, spoiler, despoiler, raider, freebooter]