S: (n) armor, armour (protective covering made of metal and used in combat)
S: (n) bell jar, bell glass (a bell-shaped glass cover used to protect and display delicate objects or to cover scientific apparatus or to contain gases)
S: (n) heat shield (a protective covering that protects a spacecraft from overheating on reentry)
S: (n) hood, bonnet, cowl, cowling (protective covering consisting of a metal part that covers the engine) "there are powerful engines under the hoods of new cars"; "the mechanic removed the cowling in order to repair the plane's engine"
S: (n) housing (a protective cover designed to contain or support a mechanical component)
S: (n) lampshade, lamp shade, shade (a protective ornamental covering for a lamp, used to screen a light bulb from direct view)
S: (n) lining, liner (a protective covering that protects an inside surface)
S: (n) mask (a protective covering worn over the face)
S: (n) mulch (a protective covering of rotting vegetable matter spread to reduce evaporation and soil erosion)
S: (n) roof (a protective covering that covers or forms the top of a building)
S: (n) roof (protective covering on top of a motor vehicle)
S: (n) screen (a protective covering consisting of netting; can be mounted in a frame) "they put screens in the windows for protection against insects"; "a metal screen protected the observers"
S: (n) shade (protective covering that protects something from direct sunlight) "they used umbrellas as shades"; "as the sun moved he readjusted the shade"
S: (n) sheath (a protective covering (as for a knife or sword))
S: (n) sheathing, overlay, overlayer (protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior)
S: (n) shelter (protective covering that provides protection from the weather)
S: (n) shield (a protective covering or structure)
S: (n) splasher (a protective covering over or beside a wheel to protect the upper part of a vehicle from splashes of mud)
S: (n) testudo (a movable protective covering that provided protection from above; used by Roman troops when approaching the walls of a besieged fortification)