/ Thesaurus / T Synonyms of thunder lizard Find synonyms for: Noun1. apatosaur, apatosaurus, brontosaur, brontosaurus, thunder lizard, Apatosaurus excelsus, sauropod, sauropod dinosaurusage: huge quadrupedal herbivorous dinosaur common in North America in the late JurassicWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language