/ Thesaurus / T Synonyms of telephone circuit Find synonyms for: Noun1. telephone line, phone line, telephone circuit, subscriber line, line, connection, connexion, connector, connecter, connectiveusage: a telephone connectionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language