/ Thesaurus / A Synonyms of antediluvial Find synonyms for: Adjective1. antediluvian, antediluvialusage: of or relating to the period before the biblical flood; "antediluvian man"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language