Real gross national product (RGNP) refers to the economic output of a country that is adjusted for inflation. There are several synonyms for RGNP that are used interchangeably in economics, including real GDP, real national income, and real net national product. All of these terms refer to the same concept of measuring a country's economic output while adjusting for inflation. Real GDP is one of the most commonly used terms as it measures the total value of goods and services produced within a country's borders during a specific period. However, each term has its own specific calculation method, making them useful for different purposes.