Islam – the religion of Muslims, a monotheistic faith regarded as revealed through Muhammad as the Prophet of Allah.
Muslim – a follower of the religion of Islam.
sect – a religious denomination, generally used to describe a group that has separated from a larger group to which they belong.
secular – attitudes, activities, or other things that have no religious or spiritual basis.
Shia Islam – the second largest denomination of Islam; Shiites are currently in power in Iraq.
Sunni Islam – the largest branch of Islam; ISIS is Sunni.