Capital market line is a term used in finance to describe the investment portfolio that consists of risky and risk-free assets. It is often used to represent the line that represents the expected return and risk of a portfolio. However, there are several synonyms for the capital market line that are commonly used. The most common synonym is the Security Market Line, which represents a graphical representation of the relationship between risk and return. Other synonyms for the capital market line include the Efficient Frontier, the Portfolio Frontier, and the Market Portfolio Line. All of these terms are used to describe the investment boundaries that help investors in making decisions for their portfolio.