caliph vs Muslim

caliph and Muslim both are nouns.

Word	Noun	Adjective	Verb	Adverb
caliph	Yes	No	No	No
Muslim	Yes	Yes	No	No

As nouns, Muslim is a hypernym of caliph; that is, Muslim is a word with a broader meaning than caliph:

caliph: the civil and religious leader of a Muslim state considered to be a representative of Allah on earth
Muslim: a believer in or follower of Islam

Other hypernyms of caliph include Moslem, ruler, swayer.

caliph (noun)	Muslim (noun)
the civil and religious leader of a Muslim state considered to be a representative of Allah on earth	a believer in or follower of Islam

caliph (adjective)	Muslim (adjective)
	of or relating to or supporting Islamism