telephone circuit vs connective

telephone circuit and connective both are nouns.

Word	Noun	Adjective	Verb	Adverb
telephone circuit	Yes	No	No	No
connective	Yes	Yes	No	No

As nouns, connective is a hypernym of telephone circuit; that is, connective is a word with a broader meaning than telephone circuit:

Other hypernyms of telephone circuit include connecter, connection, connector, connexion.

telephone circuit (noun)	connective (noun)
a telephone connection	an instrumentality that connects
	an uninflected function word that serves to conjoin words or phrases or clauses or sentences

telephone circuit (adjective)	connective (adjective)
	connecting or tending to connect