1) Aggressor 2) Assailant 3) Assaulter 4) Attacker 5) Guerrilla 6) Killer 7) Pillager 8) Piranha 9) Plundering raider 10) Predator 11) Vulture 1) Bandit 2) Hun 3) Piranha 4) Predator 5) Raider 6) Thief 
MARAUDER is, or was, a United States Government research project. It is an acronym standing for Magnetically Accelerated Ring to Achieve Ultra-high Directed Energy and Radiation. It was first reported on August 1, 1993. The objective appears to be the firing of 1 meter diameter toroids of magnetically contained plasma. The toroids behave nothing l...
• (v.) A rover in quest of booty or plunder; a plunderer; one who pillages.
Ma·raud`er noun [ From Maraud , v. : confer French maraudeur .] A rover in quest of booty or plunder; a plunderer; one who pillages. De Quincey. 
One who, while employed in the army as a soldier, commits a larceny or robbery in the neighborhood of the camp, or while wandering away from the army.
[n] - someone who attacks in search of booty
Series of wheeled armoured vehicles [US]
predator noun someone who attacks in search of booty