hippopotamus, hippo, river horse, Hippopotamus amphibius
['French horn, horn', 'impala, Aepyceros melampus', 'killer whale, killer, orca, grampus, sea wolf, Orcinus orca', 'sidewinder, horned rattlesnake, Crotalus cerastes', 'bittern', 'gorilla, Gorilla gorilla', 'projectile, missile']