The term 'Broad Bean' is used to refer to four different types of beans: Fava (4 letters), LIMA (4 letters), Soya (4 letters), and Haba (4 letters). Fava beans are a type of legume native to the Mediterranean region, while LIMA beans are a type of legume native to Central and South America. Soya beans are a type of legume native to East Asia, and Haba beans are a type of legume native to Mexico. All four types of beans are known for their high protein content and are commonly used in a variety of dishes.