National Capital refers to the city which is the center of a country's political and administrative activities. A few synonymous words that can be used in place of the term 'National Capital' are capital city, seat of government, administrative center, and political center. The term 'Capital City' refers to the city that houses the seat of government and administration. The words 'Seat of Government' refers to the city that is the center of political power of a country or state. The word 'Administrative Center' refers to the city that is responsible for administrative tasks within a country. 'Political Center' refers to the city that is the hub of political activity of a state or country.