The term "pure rate of interest" is often used in finance to refer to the base interest rate without any additional factors or premiums. However, there are several synonyms for this term, including the risk-free rate, the benchmark interest rate, and the nominal interest rate. These terms are used interchangeably to refer to the basic interest rate that is used as a starting point for calculating other rates, such as the real interest rate, which takes into account inflation, or the required rate of return, which reflects the risk inherent in a particular investment. Understanding these synonyms is important for anyone involved in finance and investing, as they form the basis of many financial calculations.