/ Thesaurus / U Synonyms of unpropitious Find synonyms for: Adjective1. unpropitious (vs. propitious), ill, inauspicious, ominous, thunderous, unfavorable#2, unfavourableusage: not propitiousWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language