The term 'smoothing power tool' can be summarized as a planer, which is a 6-letter word. A planer is a woodworking tool used to create a smooth surface on a piece of wood. It works by shaving off thin layers of wood with a rotating blade. Planers are often used to flatten and even out the surface of a piece of wood, making it easier to work with. They can also be used to create decorative patterns or shapes in wood.