Old Faithful is the specific name of a geological phenomenon. The opposite of a proper noun is a common noun, sometimes known as a generic noun. A common noun is the generic name of an item in a class or group and is not capitalized unless appearing at the beginning of a sentence or in a title. The girl crossed the river.
The United States district courts are the general trial courts of the United States federal courts. There are 94 such courts. Both civil and criminal cases are filed in the district court, which is a court of both law and equity. There is a United States bankruptcy court and a number of bankruptcy judges associated with each United States district court.
U.S. Courts of Appeals. The 94 U.S. judicial districts are organized into 12 regional circuits, each of which has a United States court of appeals. A court of appeals hears appeals from the district courts located within its circuit, as well as appeals from decisions of federal administrative agencies.