The naturally occurring surface of pebbles, rocks or boulders that line the bed of a waterway or beach and provide protection against erosion.
A protective layer over a body, vehicle, or other object intended to deflect or diffuse damaging forces.
Metal plate, protecting a ship, military vehicle, or aircraft.
A tank, or other heavy mobile assault vehicle.
A military formation consisting primarily of tanks or other armoured fighting vehicles, collectively.
A natural form of this kind of protection on an animal's body.
To equip something with armor or a protective coating or hardening.
To provide something with an analogous form of protection.
The distance between a water level and the top of something that contains or restrains it (such as a dam).
The distance between the top of sea ice and the water level.
A type of skateboard which simulates the movement of a snowboard when used on a downhill coarse, allowing snowboarding techniques, which has an addition of two centerline casters that extend below the traditional skateboard wheels and bogies.
The vertical distance between the waterline and the uppermost watertight deck of a vessel.