- Wahhabism - Movement in Islam from mid-18th century, calling for a renewal of the Muslim spirit. Includes prohibitions and commandments.
- Waliy - Holy man or woman (waliya) in Islam. Often translated into English with "Saint".
- Waqf - A religious endowment, giving property, as regulated by Islamic law. Revenues finance mosques and another religious institutions.
- West Bank - Palestinian territory, situated west of the Jordan River and the Dead Sea, and east of Israel. Population is 2.1 million, of which 87% are Palestinian Sunni Muslims, 8% are Palestinian Christians, and 5% Jewish Israeli settlers.
- Western Sahara - Republic under partial Moroccan occupation. Includes details about its geography and history.
