/ Thesaurus / R Synonyms of respiratory rate Find synonyms for: Noun1. respiratory rate, rate of respiration, vital sign, rateusage: the rate at which a person inhales and exhales; usually measured to obtain a quick evaluation of a person's healthWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language