The Collaborative International Dictionary of English v.0.48:

Loot \Loot\, v. t. & i. [imp. & p. p. Looted; p. pr. & vb. n.
   Looting.]
   To plunder; to carry off as plunder or a prize lawfully
   obtained by war.
   [1913 Webster]

         Looting parties . . . ransacking the houses. --L.
                                                  Oliphant.
   [1913 Webster]

WordNet (r) 3.0 (2006):

looting
    n 1: plundering during riots or in wartime [syn: looting,
         robbery]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "looting":
   assault, attack, banditry, battering, brigandage, brigandism,
   butchery, depredation, despoiling, despoilment, despoliation,
   direption, disorderliness, foraging, foray, forcible seizure,
   freebooting, killing, laying waste, marauding, massacre,
   obstreperousness, onslaught, pillage, pillaging, plunder,
   plundering, plunderous, predacious, predacity, predatory, raid,
   raiding, ransacking, rapaciousness, rapacity, rape, rapine, ravage,
   ravagement, ravaging, ravenousness, ravishment, razzia, reiving,
   rifling, riot, rioting, sack, sacking, sharkishness, slaughter,
   sowing with salt, spoiling, spoliation, spoliatory, unruliness,
   violation, wolfishness