/ Thesaurus / A Synonyms of antonymous Find synonyms for: Adjective1. antonymous (vs. synonymous), complementary, contradictory, contrary, contrastive, incompatible, converseusage: of words: having opposite meaningsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language