telephone wire vs telegraph line

telephone wire and telegraph line both are nouns.

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

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

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

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

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