amphibian, amphibious vehicle
['bullfrog, Rana catesbeiana', 'bathtub, bathing tub, bath, tub', 'leatherback turtle, leatherback, leathery turtle, Dermochelys coriacea', 'rubber eraser, rubber, pencil eraser', 'garbage truck, dustcart', 'red-breasted merganser, Mergus serrator', 'shield, buckler']