The term EDIBLE CORM can be broken down into two crossword solutions: EDDO (4 letters) and TARO (4 letters). EDDO is a type of edible root vegetable, also known as an oca, which is native to the Andes Mountains in South America. It is a starchy tuber that is usually boiled or roasted and can be used in a variety of dishes. TARO is another type of edible root vegetable, also known as dasheen, which is native to Southeast Asia and the Pacific Islands. It is a starchy tuber that is usually boiled or steamed and can be used in a variety of dishes. Both EDDO and TARO are examples of edible corms, which are underground storage organs of plants that are edible and can be used in cooking.