Breadcrumb Home > Thesaurus > P Synonyms of private line Find synonyms for: Noun1. private line, telephone line, phone line, telephone circuit, subscriber line, lineusage: a telephone line serving a single subscriberWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: sepulture Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language