Breadcrumb Home > Thesaurus > D Synonyms of diphthong Find synonyms for: Noun 1. diphthong, vowel, vowel sound usage: a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of diphthong (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: inmediasres Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language