Breadcrumb Home > Thesaurus > B Synonyms of brontosaurus Find synonyms for: Noun 1. apatosaur, apatosaurus, brontosaur, brontosaurus, thunder lizard, Apatosaurus excelsus, sauropod, sauropod dinosaur usage: huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of brontosaurus (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: avatar Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language