The term 'Swing Back and Forth' can be described by three different words: WAG, SWAY, and OSCILLATE. WAG is a verb meaning to move from side to side with quick, short movements. SWAY is a verb meaning to move or swing gently back and forth or from side to side. OSCILLATE is a verb meaning to move or swing backward and forward or from side to side in a regular rhythm. All three words describe the same action of swinging back and forth.