The Afghan monetary unit refers to the currency used in Afghanistan, known as the Afghan afghani. However, there are several synonyms for this term that can be used interchangeably. These include the Afghan currency, Afghan rupee, and Afghan pound. Though these terms have fallen out of use, they are still recognized by some individuals and can be used to express the same idea as the Afghan monetary unit. It is important to note that the official name for the currency in Afghanistan is the afghani, but the use of synonyms is sometimes necessary in certain situations.