The term "Copper State" is commonly used to refer to the state of Arizona, which is known for its rich copper reserves and mining industry. However, there are also several synonyms that can be used to describe Arizona. One such synonym is "The Grand Canyon State," which refers to Arizona's most famous natural landmark, the Grand Canyon. Another synonym is "The Valentine State," a reference to Arizona's entry into the Union on Valentine's Day in 1912. "The Apache State" is another alternative, paying homage to the Native American tribe that has a long history in Arizona. Alternatively, some may refer to Arizona as "The Sun Devil State," a nod to the mascot of Arizona State University.