political leader vs leader

political leader and leader both are nouns.

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

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

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