The term 'Dollar Competitor' refers to three different currencies: the Euro (4 letters), the ALAMO (5 letters), and the Avis (4 letters). The Euro is the official currency of the European Union, and is used by 19 of the 28 member states. The ALAMO is the official currency of Mexico, and is used by many Latin American countries. Finally, the Avis is the official currency of the United States, and is used by many countries around the world. All three currencies are used as a form of competition to the US Dollar, and are often used as a form of international trade.