telegraph line vs telephone wire

telegraph line and telephone wire both are nouns.

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

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

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

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

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