glass: a hard transparent material which is used to make windows, bottles and other objects. Laminated glass:consisting of several thin layers of glass stuck covered with a thin protective layer of plastic: cable - stayed: steel: a strong metal which is a mixture of iron and carbon, and which is used for making things which need a strong structure, especially vehicles and buildings concrete: a very hard building material made by mixing together cement, sand, small stones and water reinforced concrete: concrete that contains metal rods to make it stronger natural stone: the hard solid substance found in the ground which is often used for building ceramic: the production of objects by shaping pieces of clay which are then hardened by baking
