/ Thesaurus / I Synonyms of ipsedixitism Find synonyms for: Noun1. ipse dixit, ipsedixitism, assertion, averment, asseverationusage: an unsupported dogmatic assertionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language