hippopotamus, hippo, river horse, Hippopotamus amphibius
['great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias', 'sidewinder, horned rattlesnake, Crotalus cerastes', 'tank, army tank, armored combat vehicle, armoured combat vehicle', 'sea snake', 'lakeside, lakeshore', 'bathtub, bathing tub, bath, tub', 'gar, garfish, garpike, billfish, Lepisosteus osseus']