/ Thesaurus / O Synonyms of ornithorhynchus anatinus Find synonyms for: Noun1. platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus, monotreme, egg-laying mammalusage: small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family OrnithorhynchidaeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language