Cashew nut, often simply called a cashew, is widely consumed. It is eaten on its own, used in recipes, or processed into cashew cheese orâ cashew butter. The shell of the cashew seed yields derivatives that can be used in many applications including lubricants, waterproofing, paints, and arms production, starting in world war ii. the cashew apple is a light reddish to yellow fruit, whose pulp can be processed into a sweet, â astringent fruit drink or distilled into liquor& cnsl oil