Breadcrumb Home > Thesaurus > H Synonyms of hadrosaur Find synonyms for: Noun 1. hadrosaur, hadrosaurus, duck-billed dinosaur, ornithischian, ornithischian dinosaur usage: any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of hadrosaur (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: propinquity Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language