Muslim

adj. of or pertaining to Islam; associated with the Islamic culture or religion

n. adherent of Islam (also Moslem)

There is also a collection of Hadith called Sahih Muslim A Muslim is an adherent of the religion of  Islam. The feminine form of 'Muslim' is Muslimah . Literally, the word means "one who submits to God)". The word "Muslim" is the participle of the same verb of which "Islam" is the infinitive.
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Noun
1. a believer or follower of Islam
(synonym) Moslem, Mohammedan, Muhammedan, Muhammadan, Islamist
(hypernym) religionist, religious person
(hyponym) Jihadist
(member-holonym) Islam, Islamism, Muslimism, Muhammadanism, Mohammedanism, Mohammadanism
Adjective
1. of or relating to or supporting Islamism; "Islamic art"
(synonym) Moslem, Islamic
(pertainym) Islam, Islamism, Mohammedanism, Muhammadanism, Muslimism

(n.)
See Moslem.
  

The proper name for a follower of the Islamic faith (founded c. 600 A.D.), known to most medieval people as Saracens .