1) Buccaneer 2) Despoiler 3) Looter 4) Picaroon 5) Pillager 6) Pirate 7) Piratical 8) Plunderer 9) Raider 1) Buccaneer 2) Despoiler 3) Looter 4) Pillager 5) Pirate 6) Plunderer 7) Raider 8) Spoiler 9) Stealer 10) Thief 
A person who is searching for plunder aka a pirate. As in, “The lousy freebooter stole my apple again.”
• (n.) One who plunders or pillages without the authority of national warfare; a member of a predatory band; a pillager; a buccaneer; a sea robber.
another term for a pirate, probably originating from a corruption of the Dutch vrijbuiters (plunderers), combining the words vrij meaning free and buit meaning loot
Free'boot`er noun [ Dutch vrijbuiter , from vrijbuiten to plunder; vrij free + buit booty, akin to English booty . See Free , and Booty , and confer Filibuster .] One who plunders or pillages without the authority of national warfare; a member ...
another term for pirate
a person who goes about in search of plunder; pirate; buccaneer.