amphibian, amphibious vehicle
['grille, radiator grille', 'paddle, boat paddle', 'lifeboat', 'punching bag, punch bag, punching ball, punchball', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'knee pad', 'tricycle, trike, velocipede']