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What is the difference between Islam and Muslim?

Kuala Lumpur skyline seen from the National Mosque of Malaysia
Photo: Sam Hidayat, CC BY-SA 4.0 via Wikimedia Commons

Islam is the religion; a Muslim is a person who follows it. Both words come from the same Arabic root, s-l-m, linked to submission and peace. So Islam means "submission to God", and a Muslim is "one who submits to God".

Islam: the name of the religion

Islam is the faith itself: its beliefs, its worship and its way of life. Unlike some religions, it isn't named after a person or a place. The name describes an attitude: willingly surrendering yourself to the One God. The Quran uses this name directly:

إِنَّ ٱلدِّينَ عِندَ ٱللَّهِ ٱلْإِسْلَـٰمُ "Indeed, the religion in the sight of Allah is Islam." Quran 3:19

Muslim: the person

A Muslim is someone who accepts Islam, beginning with the shahada: "There is no god but Allah, and Muhammad is the Messenger of Allah." See How do I take my shahada? The Quran also calls earlier prophets such as Abraham "Muslim" in the root sense, because they submitted to God. The Prophet ﷺ described the ideal Muslim in practical terms: "A Muslim is the one from whose tongue and hand other Muslims are safe" (Sahih al-Bukhari 10). So the word carries a moral ideal too, not just a label.

How to use the words correctly

  • Islam is a noun for the religion: "She is learning about Islam."
  • Muslim is a noun for a person: "He became a Muslim last year." It also works as an adjective for people and communities: "a Muslim family", "Muslim students".
  • Islamic is an adjective for things related to the religion: "Islamic art", "Islamic law", "an Islamic school".
  • Older spellings like "Moslem" and the term "Mohammedan" are outdated, and many Muslims find "Mohammedan" wrong because Muslims worship God, not Muhammad. See Do Muslims worship Muhammad?

Islam vs. what Muslims do

This difference matters in conversations. Islam is the teaching; Muslims are human beings who sometimes live up to it and sometimes fall short. When someone does something wrong "in the name of Islam", the question is always whether Islam's sources actually teach it. Many converts say they fell in love with Islam first and only later met the wonderful (and imperfect) Muslim community. If you're comparing faiths, see What is the difference between Islam and Christianity?

Key points
  • Islam is the religion; a Muslim is a follower of it.
  • Both come from the root s-l-m: submission and peace.
  • Use "Islamic" for things, "Muslim" for people.
  • Judge Islam by its sources, not by individual behavior.
Tip: If friends or family ask why you say "Muslim" and not "Moslem", a simple answer works: it's the spelling Muslims themselves use, and it's closer to the Arabic pronunciation.

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