Muslim Ummah vs Islamic Ummah

Muslim Ummah and Islamic Ummah both are nouns.

Word	Noun	Adjective	Verb	Adverb
Muslim Ummah	Yes	No	No	No
Islamic Ummah	Yes	No	No	No

As nouns, Muslim Ummah and Islamic Ummah are synonyms defined as:

Muslim Ummah and Islamic Ummah: the Muslim community or people, considered to extend from Mauritania to Pakistan

Other synonyms of Muslim Ummah include Islam Nation, Umma, Ummah.

Muslim Ummah (noun)	Islamic Ummah (noun)
the Muslim community or people, considered to extend from Mauritania to Pakistan	the Muslim community or people, considered to extend from Mauritania to Pakistan