
1) Zagros Mountain
Found on
https://www.crosswordclues.com/clue/karun

The Kārun (also spelled as Karoun) (Persian: کارون) is Iran`s most effluent and only navigable river. It is 450 miles (720 km) long. It rises in the Zard Kuh mountains of the Bakhtiari district in the Zagros Range, receiving many tributaries, such as the Dez and the Kuhrang, before passing through the capital of the Khuzestan Province of Ir....
Found on
http://en.wikipedia.org/wiki/Karun

a river in SW Iran, flowing SW to the Shatt-al-Arab. ab. 515 mi. (830 km) long.
Found on
https://www.infoplease.com/dictionary/karun
No exact match found.