The Consumer Price Index (CPI) is a widely-used measure for gauging inflation rates based on the prices of a basket of goods and services. However, there are several synonyms for the term CPI that convey the same meaning. Some common examples include the Cost of Living Index (COLI), the Harmonized Index of Consumer Prices (HICP), and the Retail Price Index (RPI). All of these synonyms are used to measure changes to the cost of living over time. The CPI, COLI, HICP, and RPI are crucial tools used by governments, central banks, and financial institutions to monitor economic trends and adjust policy accordingly.