Poleaxe, pollaxe, polaxe

"A knightly staff weapon, its head being an axehead, usually balanced by a hammerhead, and surmounted by a steel spike. The shaft was protected by steel checks and the hand by a steel rondel . Used from the fifteenth century for foot combats and for war. The component 'pole' in the name refers not to the staff, but to the Old English word 'head.'"-David Edge and John Miles Paddock, Arms and Armour of the Medieval Knight.