The term BACKSPLASH PIECE can be solved by the crossword solution TILE, which is a four letter word. A TILE is a thin, flat piece of material such as ceramic, stone, metal, or glass that is used for covering roofs, walls, floors, and other surfaces. Tiles are often used in kitchens and bathrooms as a backsplash, which is a vertical surface behind a sink or stove that protects the wall from splashes and spills.