conductor vs bandmaster

conductor and bandmaster both are nouns.

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

As nouns, bandmaster is a hyponym of conductor; that is, bandmaster is a word with a more specific, narrower meaning than conductor:

Other hyponyms of conductor include bandleader, drum major, drum majorette, majorette.

conductor (noun)	bandmaster (noun)
a device designed to transmit electricity, heat, etc.	the conductor of a band
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