A tower at the entrance to a castle or fortified town
An opening in the wall of a fortress through which the guns are levelled; a narrow loophole through which arrows and other missiles may be shot.
A fortress at the end of a bridge.
A temporary wooden tower built for defensive purposes.
A fortification consisting of a wall.
Part of a perimeter that extends above the roof.
A low protective wall.
Hyponym: balustrade