A thief is someone who steals or takes something without permission. PLUNDERER (9 letters) is someone who robs or pillages, MARAUDER (8 letters) is a person who raids and pillages, HIGHWAYMAN (10 letters) is a ROBBER on the highway, BRIGAND (7 letters) is a BANDIT or outlaw, LIFTER (6 letters) is someone who steals by lifting, DESPOILER (9 letters) is someone who plunders or ravages, KLEPTOMANIAC (12 letters) is someone with an uncontrollable urge to steal, RAIDER (6 letters) is someone who raids, DIP (3 letters) is someone who steals from a pocket or purse, SNEAK (5 letters) is someone who moves quietly and secretly, CROOK (5 letters) is a criminal, ganef (5 letters) is a thief or swindler, BANDIT (6 letters) is an outlaw or ROBBER, klepto (6 letters) is a thief or ROBBER, ROBBER (6 letters) is someone who takes property by force, BURGLAR (7 letters) is someone who breaks into a building to steal, heister (7 letters) is someone who robs, STEALER (7 letters) is someone who steals, larcener (8 letters) is someone who steals, PILFERER (8 letters) is someone who steals small amounts, LARCENIST (9 letters) is someone who commits larceny, Prometheus (10 letters) is a figure in Greek mythology who stole fire from the gods, and SAFECRACKER (11 letters) is someone who opens safes illegally.