Islam vs Islamic

Islam is a noun but Islamic is not a noun.

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

Islam (noun)	Islamic (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 civilization of Muslims collectively which is governed by the Muslim religion

Islam (adjective)	Islamic (adjective)
	of or relating to or supporting Islamism