scuba diver
['coil, spiral, volute, whorl, helix', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'trilobite', 'breakwater, groin, groyne, mole, bulwark, seawall, jetty', 'walking stick, walkingstick, stick insect', 'knee pad', 'shower curtain']