The term DIETS can be broken down into two crossword solutions: REGIMENS (8 letters) and SLIMS (5 letters). A diet is a specific set of eating habits, usually with the goal of improving health or losing weight. A regimen is a plan or system of rules, especially for health or personal improvement. Slims are a type of diet that focuses on reducing body fat and weight. Both REGIMENS and slim diets involve making changes to one's eating habits in order to achieve a desired result.