/ Thesaurus / U Synonyms of upper respiratory tract Find synonyms for: Noun1. upper respiratory tract, respiratory tract, airwayusage: the nose and throat and tracheaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language