bandleader vs director

bandleader and director both are nouns.

Word	Noun	Adjective	Verb	Adverb
bandleader	Yes	No	No	No
director	Yes	No	No	No

As nouns, director is a hypernym of bandleader; that is, director is a word with a broader meaning than bandleader:

Other hypernyms of bandleader include conductor, music director.

bandleader (noun)	director (noun)
the leader of a dance band	someone who controls resources and expenditures
	the person who leads a musical group
	someone who supervises the actors and directs the action in the production of a show
	member of a board of directors
	the person who directs the making of a film