imaum vs leader

imaum and leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
imaum	Yes	No	No	No
leader	Yes	No	No	No

As nouns, leader is a hypernym of imaum; that is, leader is a word with a broader meaning than imaum:

imaum: (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
leader: a person who rules or guides or inspires others

Other hypernyms of imaum include Moslem, Muslim.

imaum (noun)	leader (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 featured article of merchandise sold at a loss in order to draw customers
	a person who rules or guides or inspires others