imam vs Moslem

imam and Moslem both are nouns.

Word	Noun	Adjective	Verb	Adverb
imam	Yes	No	No	No
Moslem	Yes	Yes	No	No

As nouns, Moslem is a hypernym of imam; that is, Moslem is a word with a broader meaning than imam:

imam: (Islam) the man who leads prayers in a mosque; for Shiites an imam is a recognized authority on Islamic theology and law and a spiritual guide
Moslem: a believer in or follower of Islam

Other hypernyms of imam include leader, Muslim.

imam (noun)	Moslem (noun)
(Islam) the man who leads prayers in a mosque; for Shiites an imam is a recognized authority on Islamic theology and law and a spiritual guide	a believer in or follower of Islam

imam (adjective)	Moslem (adjective)
	of or relating to or supporting Islamism