The term RUST COMPONENT can be broken down into two crossword solutions: OXIDE (5 letters) and IRON (4 letters). Rust is a type of corrosion that occurs when IRON and oxygen react in the presence of water or moisture. OXIDE is a compound that contains oxygen and another element, and IRON is a chemical element that is found in nature and is used to make steel. Therefore, the two crossword solutions for the term RUST COMPONENT are OXIDE and IRON, which are both components of rust.