The term 'skyscraper material' is often used to refer to STEEL, which is a five-letter word. STEEL is an alloy of iron and carbon, and is one of the most commonly used materials in construction due to its strength and durability. It is also used in the manufacture of many everyday items such as cutlery, tools, and appliances. STEEL is also recyclable, making it an environmentally friendly choice for skyscrapers.