Heavy metal is a type of rock music characterized by aggressive, driving rhythms and loud distorted guitars. The crossword solutions for the term 'heavy metal' include radium (6 letters), BRASS (5 letters), ORE (3 letters), IRON (4 letters), LEAD (4 letters), osmium (6 letters), uranium (7 letters), and castiron (8 letters). These elements are all metals that are dense and have a high atomic weight, which makes them ideal for use in heavy metal music. Radium is a radioactive element that is used in nuclear reactors, while BRASS is an alloy of copper and zinc. ORE is a naturally occurring mineral that contains valuable metals, such as IRON, LEAD, and osmium. IRON is one of the most abundant elements on Earth and is used to make steel. LEAD is a heavy metal that is used in batteries and ammunition. Osmium is a rare metal that is used in alloys and electronics. Uranium is a radioactive element that is used in nuclear power plants. Castiron is an alloy of IRON and carbon that is used to make cookware and tools.