Paper currency is a term used to describe printed money, which is typically issued and controlled by a national government. However, there are several different synonyms that can be used to refer to paper currency. Money, cash, banknotes, bills, notes, or simply currency are examples of commonly used synonyms for paper currency. Other more formal alternatives such as legal tender, promissory notes or fiat money can also be used. Regardless of which synonym is used, paper currency plays an essential role in financial and economic systems around the world, facilitating commerce and helping nations to manage their financial affairs.