scoutmaster vs leader

scoutmaster and leader both are nouns.

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

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

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