telephone wire vs telephone line

telephone wire and telephone line both are nouns.

Word	Noun	Adjective	Verb	Adverb
telephone wire	Yes	No	No	No
telephone line	Yes	No	No	No

As nouns, telephone wire and telephone line are synonyms defined as:

telephone wire and telephone line: the wire that carries telegraph and telephone signals

Other synonyms of telephone wire include telegraph line, telegraph wire.

telephone wire (noun)	telephone line (noun)
the wire that carries telegraph and telephone signals	a telephone connection
	the wire that carries telegraph and telephone signals