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.
The federal court system has three main levels: district courts (the trial court), circuit courts which are the first level of appeal, and the Supreme Court of the United States, the final level of appeal in the federal system. There are 94 district courts, 13 circuit courts, and one Supreme Court throughout the country. Courts in the federal system work differently in many ways than state courts. The primary difference for civil cases (as opposed to criminal cases) is the types of cases that can be heard in the federal system.