The term 'become lighter' can be represented by six different crossword solutions. DIET (4 letters) is a common way to become lighter, as it involves reducing the amount of food consumed. FADE (4 letters) is another way to become lighter, as it implies a gradual decrease in intensity or strength. Ali (3 letters) is a reference to Muhammad Ali, a boxer who famously lost weight for his fights. MATCH (5 letters) is a reference to the fact that striking a MATCH produces a flame, which is an example of something becoming lighter. BIC (3 letters) is a reference to the popular brand of lighters, which are used to make fire. Finally, ZIPPO (5 letters) is another brand of lighters, which are also used to make fire.