electric ray, crampfish, numbfish, torpedo
['rubber eraser, rubber, pencil eraser', 'puck, hockey puck', 'breakwater, groin, groyne, mole, bulwark, seawall, jetty', 'nematode, nematode worm, roundworm', 'frilled lizard, Chlamydosaurus kingi', 'slide rule, slipstick', 'sulphur butterfly, sulfur butterfly']