The Qatari dirham is the official currency of Qatar, but there are several synonyms that can be used when referring to it. One of the most common synonyms is simply "dirham" or "QAR" which is the ISO currency code for the Qatari dirham. Another synonym that is occasionally used is "riyal," which is derived from the Saudi Arabian currency but is also used in Qatar. Some people may refer to the Qatari dirham as the "Qatari dollar" due to its close relationship to the USD. Regardless of the synonym used, the Qatari dirham is an important currency in the Middle East and is widely traded on international markets.