religious leader vs leader

religious leader and leader both are nouns.

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

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

Other hypernyms of religious leader include religious person.

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