The United States is a country located in North America, made up of 50 states and the District of COLUMBIA. It is often referred to as 'America' (7 letters), 'US' (2 letters), 'USOFA' (5 letters), 'COLUMBIA' (8 letters), 'NewWorld' (8 letters), 'Vermontana' (10 letters), 'LandofLiberty' (13 letters), 'HarrietTubman' (13 letters), and 'NewMexicoColorado' (15 letters). It is a federal republic with a strong democratic tradition and a long history of immigration.