Sultan vs. King: What's the ?

sultan kingThe Sultanate of Ternate (Jawi: کسلطانن ترناتي ‎), previously also known as the Kingdom of Gapi, [1] is one of the oldest Muslim kingdoms in Indonesia besides the sultanates of Tidore, Jailolo,The king of the Kingdom of Bahrain (Arabic: ملك مملكة البحرين Malik Mamlakat al-Baḥrayn) is the monarch and head of state of the Kingdom of e House of Khalifa has been