A plunderer is someone who takes something without permission, often by force. A THIEF (5 letters) is someone who steals something without permission. A PIRATE (6 letters) is someone who commits robbery at sea. A BANDIT (6 letters) is someone who robs people or property in a lawless manner. A ROBBER (6 letters) is someone who takes something from another person by force or threat of force. A RAIDER (6 letters) is someone who makes a sudden attack on a place or person. A MARAUDER (8 letters) is someone who moves around in search of things to steal or destroy. A PREYER (6 letters) is someone who preys upon others for personal gain. A BRIGAND (7 letters) is someone who lives by plundering and pillaging. A LOOTER (6 letters) is someone who steals goods during a riot or war. A DESPOILER (9 letters) is someone who destroys or plunders a place. A reaver (6 letters) is someone who raids and plunders. A rapparee (8 letters) is an Irish outlaw who robs travelers. A spoliator (9 letters) is someone who plunders or despoils.