The term WIPER can refer to a variety of cleaning tools. TOWEL, which is five letters long, is a cloth used for drying or wiping surfaces. RAG, which is three letters long, is a piece of cloth used for cleaning or polishing. MOP, which is also three letters long, is a tool used for cleaning floors. SPONGE, which is six letters long, is a porous material used for cleaning and absorbing liquids. All of these items can be used as wipers.