Folding money is a commonly-used term for paper currency but there are several other synonyms that can be used to refer to this type of money. Some common synonyms for folding money include banknotes, bills, currency, cash, legal tender, and paper money. Banknotes refer specifically to paper currency issued by a bank or government and often feature the face of a prominent figure or symbol of the issuing country. Bills, on the other hand, are any type of monetary unit, whether it be in paper or coin form. Cash, legal tender, and paper money all refer to any type of currency that is recognized and accepted as payment for goods or services.