/ Thesaurus / M Synonyms of modal verb Find synonyms for: Noun1. modal auxiliary verb, modal auxiliary, modal verb, modal, auxiliary verbusage: an auxiliary verb (such as `can' or `will') that is used to express modalityWordNet 3.0 Copyright 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language