The term 'National Rival' can be broken down into three separate words: Oriole (6 letters), ALAMO (5 letters), and Avis (4 letters). Oriole is a type of bird found in North America, Europe, and parts of Asia. The ALAMO is a famous fort in San Antonio, Texas, which was the site of a battle between Mexican and Texan forces in 1836. Avis is a car rental company founded in 1946. All three of these words are related to the concept of national rivalry, as they represent different aspects of American culture.