fender

(noun) a barrier that surrounds the wheels of a vehicle to block splashing water or mud. Synonyms: wing. Example: "In britain they call a fender a wing."

(noun) an inclined metal frame at the front of a locomotive to clear the track. Synonyms: buffer, cowcatcher, pilot.

(noun) a low metal guard to confine falling coals to a hearth.

(noun) a cushion-like device that reduces shock due to an impact. Synonyms: buffer.