submarine, pigboat, sub, U-boat
['loudspeaker, speaker, speaker unit, loudspeaker system, speaker system', 'bell cote, bell cot', 'barrel, cask', 'radio telescope, radio reflector', 'lakeside, lakeshore', 'great white shark, white shark, man-eater, man-eating shark, Carcharodon carcharias', 'barometer']