role model vs leader

role model and leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
role model	Yes	No	No	No
leader	Yes	No	No	No

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

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