Marauder

(n.) A rover in quest of booty or plunder; a plunderer; one who pillages.

Thesaurus Entries

bandit, brigand, buccaneer, bummer, depredator, desperado, despoiler, forager, forayer, freebooter, looter, pillager, pirate, plunderer, raider, rapparee, ravager, ravisher, reiver, rifler, sacker, spoiler, spoliator, wrecker