A smoothing tool is a type of tool used to create a smooth surface on a material. The crossword solutions for the term 'smoothing tool' include PLANE (5 letters), FILE (4 letters), sander (6 letters), LATHE (5 letters), ADZE (4 letters), and planer (6 letters). A PLANE is a tool used to flatten or shape wood, while a FILE is a metalworking tool used to remove small amounts of material from a workpiece. A sander is a power tool used to smooth surfaces by abrasion with sandpaper, while a LATHE is a machine tool used to shape a piece of material by rotating it against a cutting tool. An ADZE is an ancient tool used to shape wood, and a planer is a woodworking tool used to create a flat surface on a piece of wood.