The crossword solutions for the term U.S.A. or U.K. are the initials of the two countries, USA and UK. The United States of America is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions. The United Kingdom is a sovereign country located off the north-western coast of the European mainland. It is a constitutional monarchy comprising four countries: England, Scotland, Wales, and Northern Ireland.