Umma vs Muslim Ummah

Umma and Muslim Ummah both are nouns.

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

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

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

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

Umma (noun)	Muslim 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