The term 'Desert Iran' refers to the country of Iran, which is located in the Middle East and is part of the continent of ASIA. The currency of Iran is the Rial, which is represented by the four-letter word RIAL. The current head of state of Iran is the SHAH, which is represented by the four-letter word SHAH. Finally, the continent on which Iran is located is ASIA, which is represented by the four-letter word ASIA.