pirate

[1]	plagiarize , infringe , copy , reproduce , steal , appropriate , poach , (Colloq) lift , pinch , crib
[2]	commandeer , hijack , highjack

[1]	plagiarist , buccaneer , sea rover , plagiarizer , plagiariser , corsair , privateer , literary pirate , freebooter , sea-robber , filibuster , (Archaic) picaroon
[2]	plagiarist , buccaneer , sea robber , plagiarizer , infringer , sea rover
[3]	pirate ship