raider

from WordNet (r) 3.0 (2006)

raider
    n 1: someone who takes spoils or plunder (as in war) [syn:
         {plunderer}, {pillager}, {looter}, {spoiler}, {despoiler},
         {raider}, {freebooter}]
    2: a corporate investor who intends to take over a company by
       buying a controlling interest in its stock and installing new
       management

from The Collaborative International Dictionary of English v.0.48

Raider \Raid"er\ (r[=a]d"[~e]r), n.
   One who engages in a raid. [U.S.]
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

25 Moby Thesaurus words for "raider":
      aggressor, assailant, assailer, assaulter, attacker, depredator,
      despoiler, forager, forayer, freebooter, invader, looter, marauder,
      mugger, pillager, plunderer, rapparee, ravager, ravisher, reiver,
      rifler, sacker, spoiler, spoliator, wrecker

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