The term 'move from side to side' can be described by three different words: SWAY (4 letters), WAG (3 letters), and SWING (5 letters). SWAY is a verb that means to move or SWING gently from side to side, often in a rhythmical pattern. WAG is a verb that means to move something back and forth, usually in a playful or excited manner. SWING is a verb that means to move or cause to move back and forth or from side to side with a steady, uninterrupted rhythm. All three words describe the same action of moving from side to side.