busbar vs conductor

busbar and conductor both are nouns.

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

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

busbar: an electrical conductor that makes a common connection between several circuits
conductor: a device designed to transmit electricity, heat, etc.

busbar (noun)	conductor (noun)
an electrical conductor that makes a common connection between several circuits	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