The term 'Wheel Action' can be summarized as a rolling motion. The crossword solution for this term is 'ROLL', which is a four-letter word. Rolling is a type of circular motion in which an object or person moves in a circle or along a curved path. It is often used to describe the movement of a wheel, such as a car wheel or a bicycle wheel. Rolling can also be used to describe the movement of a person, such as when someone rolls over in bed or rolls down a hill.