bobsled, bobsleigh, bob
['spotlight, spot', 'coil, spiral, volute, whorl, helix', 'wing', 'stretcher', 'breakwater, groin, groyne, mole, bulwark, seawall, jetty', 'seashore, coast, seacoast, sea-coast', 'backpack, back pack, knapsack, packsack, rucksack, haversack']