The term 'Soup Grain' refers to a type of grain used in soups and other dishes. The two crossword solutions for this term are BARLEY (6 letters) and Pearl BARLEY (11 letters). BARLEY is a cereal grain that is widely used in soups, stews, and other dishes. Pearl BARLEY is a type of BARLEY that has been processed to remove the outer husk, making it easier to cook with. Both types of BARLEY are popular ingredients in soups and other dishes.