brigand
ˈbrɪɡ(ə)nd
noun
a member of a gang that ambushes and robs people in forests and mountains.
bandit,robber,outlaw,ruffian,desperado,plunderer,marauder,raider,pillager,highwayman,criminal,thug,gangster,pirate,freebooter,dacoit,holdupper,cateran,mosstrooper,reaver