The capital of Guam, Old-Styl, can be found in four different crossword solutions: Agana (5 letters), Mariana (7 letters), Ter (3 letters), and Marianas (8 letters). Agana is the capital of Guam, a small island in the western Pacific Ocean. Mariana is the name of the archipelago that includes Guam and other nearby islands. Ter is an abbreviation for the Territory of Guam, which is the official name of the island. Marianas is the name of the larger region that includes Guam and other nearby islands.