bandleader vs conductor

bandleader and conductor both are nouns.

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

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

Other hypernyms of bandleader include director, music director.

bandleader (noun)	conductor (noun)
the leader of a dance band	a device designed to transmit electricity, heat, etc.
	the person who leads a musical group
	the person who collects fares on a public conveyance
	a substance that readily conducts e.g. electricity and heat