Poleaxe, Polearm, Polehammer, Bec de corbin, Bec de faucon
These were all different kinds of poles with varying heads on the top, such as an axe (in the poleaxe).
A polearm with a wide cutting blade, sometimes with spikes or hooks. It was used against mounted soldiers. The blade at the top was curved, so the point was combined with a large swing to cut through armor.
A 12-18 foot pole with sharp spikes on top; used to maim horses. (Mahabal)