noun

a man, typically on horseback, who held up travellers at gunpoint in order to rob them.

bandit,brigand,robber,outlaw,ruffian,desperado,plunderer,marauder,raider,ravager,pillager,freebooter,criminal,thug,gangster,bandolero,ladrone,dacoit,knight of the road,footpad,land pirate,tobyman,reaver,snaphance,thief errant,mosstrooper