The crossword solution for the term 'Something Worn on a Hood' is CORROSION, which has 9 letters. CORROSION is a process of deterioration of a material due to a reaction with its environment. It is most commonly seen in metals, but can also occur in other materials such as ceramics or polymers. CORROSION is often caused by exposure to water, oxygen, or other chemicals. It can also be caused by mechanical stress or electrical currents. CORROSION can lead to structural weakening and failure of the material, making it an important factor to consider when designing and constructing structures.