A "margin account" is a financial term that refers to an investment account provided by a brokerage firm, allowing investors to borrow funds for trading purposes. Synonyms for a margin account include leverage account, borrowed funds account, or margin trading account. These terms all convey the same meaning - an account that allows the investor to trade with borrowed money, typically using securities as collateral. Whether it's called a margin account, leverage account, borrowed funds account, or margin trading account, the fundamental concept remains unchanged - investors are able to amplify their trading positions by utilizing borrowed funds from a brokerage firm.