People who believe in the divinity of ONE GOD, the Creator God, are called monotheistic.
A person who believes in one God, is called a Monothiest: (Monothiesm).
Since it is monotheism (belief in one god) almost all of them refer to their god simply as 'God'.
A Muslim (correct spelling Muslim ) is a person who believes in one God, called monothiest. The one true God "Allah" is the Supreme and Omnipotent. Their faith has five pillars. In accordance with Islam His throne doth extends over the heavens and the Earth. And they believe in that Muhammad peace and blessings be upon him is their last prophet. They approve the faith of all religions exept that they were correct to follow in the times of their prophets and the faiths are not in their correct form today. Their Holy Book is Al-Quran, their guidance.
Many people are now describing themselves as "spiritual, not religious".You probably are agnostic because Agnostics believe In God and aren't quite sure of a religion, or they aren't sure about God's existence.An athiest is someone who doesn't believe in God.A Monothiest is someone who believe's in one God.