/ Thesaurus / V Synonyms of vowel sound Find synonyms for: Noun1. vowel, vowel sound, phone, speech sound, soundusage: a speech sound made with the vocal tract openWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: jovial Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language