As nouns the difference between battlement and barmkin

is that battlement is in fortification: an indented parapet, formed by a series of rising members called cops or merlons, separated by openings called crenelles or embrasures, the soldier sheltering himself behind the merlon while he fires through the embrasure or through a loophole in the battlement while barmkin is (obsolete) the battlement on the exterior fortification of a castle in northern england and parts of scotland; a barbican.