Breadcrumb Home > Thesaurus > U Synonyms of umlaut Find synonyms for: Noun1. umlaut, dieresis, diaeresis, diacritical mark, diacriticusage: a diacritical mark (two dots) placed over a vowel in German to indicate a change in soundWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of umlaut (Dictionary) ✖ Related Content Daily Word Quiz: guilloche Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language