The term 'kind of iron' can refer to a variety of different types of iron. NINE is an alloy of iron and other metals, WAFFLE is a type of iron used for cooking, soldering is a process of joining two pieces of metal together using heat, SHOOTING is a type of iron used for making bullets, SCRAP is a type of iron that is recycled, TIRE is a type of iron used for making tires, WROUGHT is a type of iron that is malleable, PIG is a type of iron used for making pipes, SAD is a type of iron used for making tools, FLAT is a type of iron used for making FLAT surfaces, GRID is a type of iron used for making grills, STEAM is a type of iron used for making STEAM engines, CURLING is a type of iron used for making curls in hair, DRIVING is a type of iron used for making nails, and branding is a type of iron used for making brands.