Long-term capital gain is a term used by the finance industry to refer to the profit earned from an investment that is held for a year or more. However, there are several synonyms for the term that can be used interchangeably. These synonyms include capital appreciation, long-term investment, long-hold gain, long-term profit and return on investment. Each of these terms describes an investment strategy where the investor holds onto an asset for an extended period, leading to a gain or profit over time. These synonyms are commonly used in financial reports, investment portfolios, and tax documents to describe the performance of an investor's portfolio over the long-term.