Breakfast chain is a term used to describe restaurants that specialize in breakfast foods. The two most popular breakfast chains are BACON (5 letters) and IHOP (4 letters). BACON is a fast-casual restaurant chain that serves breakfast all day, as well as lunch and dinner. IHOP is an international chain of family-style restaurants that specializes in breakfast items such as pancakes, waffles, omelettes, and French toast. Both chains offer a variety of breakfast options for customers to choose from.