fender.

panel of a car which encloses the wheel area, especially the front wheels.

a shield, usually of plastic or metal, on a bicycle that protects the rider from mud or water

any shaped cushion-like object normally made from polymers, rubber or wood that is placed along the sides of a boat to prevent damage when moored alongside another vessel or jetty, or when using a lock, etc. Modern variations are cylindrical although older wooden version and rubbing strips can still be found; old tyres are used as a cheap substitute

a low metal framework in front of a fireplace, intended to catch hot coals, soot, and ash

To use fenders to protect the side of a boat