The term MOVES BACK AND FORTH can be summarized by three crossword solutions: SWAYS (5 letters), WAGS (4 letters), and CRISSXES (8 letters). SWAYS is a verb meaning to move or swing gently from side to side, often in a rhythmical manner. WAGS is a verb meaning to move quickly from side to side, usually in an excited or playful way. CRISSXES is a verb meaning to move back and forth in a zigzag pattern. All three words describe a type of movement that involves going back and forth.