The term DINER MENU SECTION can be solved by the four-letter word EGGS. Eggs are a staple of diner menus, often appearing in breakfast sections as omelettes, scrambles, and fried eggs. They are also used in other dishes such as egg salad sandwiches and egg-based sauces. Eggs are a versatile and affordable ingredient that can be used in a variety of ways, making them a popular choice for diners.