/ Thesaurus / E Synonyms of edaphosaurus Find synonyms for: Noun1. edaphosaurus, synapsid, synapsid reptileusage: heavy-bodied reptile with a dorsal sail or crest; of the late PaleozoicWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language