Ummah vs Umma

Ummah and Umma both are nouns.

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

As nouns, Ummah and Umma are synonyms defined as:

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

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

Ummah (noun)	Umma (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