Breadcrumb Home > Thesaurus > O Synonyms of ornithopter Find synonyms for: Noun 1. orthopter, ornithopter, heavier-than-air craft usage: heavier-than-air craft that is propelled by the flapping of wings WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of ornithopter (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: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language