Genus Ornithorhynchus Genus Ornithorhynchus antonyms If you know antonyms for Genus Ornithorhynchus, then you can share it. Suggest antonym for Genus Ornithorhynchus Genus Ornithorhynchus synonyms ornithorhynchus mammal genus If you know synonyms for Genus Ornithorhynchus, then you can share it. Suggest synonym for Genus Ornithorhynchus