subscriber line vs connecter

subscriber line and connecter both are nouns.

Word	Noun	Adjective	Verb	Adverb
subscriber line	Yes	No	No	No
connecter	Yes	No	No	No

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

Other hypernyms of subscriber line include connection, connective, connector, connexion.

subscriber line (noun)	connecter (noun)
a telephone connection	an instrumentality that connects