transmission line vs conductor

transmission line and conductor both are nouns.

Word	Noun	Adjective	Verb	Adverb
transmission line	Yes	No	No	No
conductor	Yes	No	No	No

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

transmission line: a conductor for transmitting electrical or optical signals or electric power
conductor: a device designed to transmit electricity, heat, etc.

transmission line (noun)	conductor (noun)
a conductor for transmitting electrical or optical signals or electric power	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