/ Thesaurus / D Synonyms of diapsid reptile Find synonyms for: Noun1. diapsid, diapsid reptile, reptile, reptilianusage: reptile having a pair of openings in the skull behind each eyeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language