Islam vs Islamic Ummah

Islam and Islamic Ummah both are nouns.

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

Islam (noun)	Islamic Ummah (noun)
the monotheistic religious system of Muslims founded in Arabia in the 7th century and based on the teachings of Muhammad as laid down in the Koran	the Muslim community or people, considered to extend from Mauritania to Pakistan
the civilization of Muslims collectively which is governed by the Muslim religion