submarine, pigboat, sub, U-boat
['sea anemone, anemone', 'killer whale, killer, orca, grampus, sea wolf, Orcinus orca', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'prison, prison house', 'wing', 'gar, garfish, garpike, billfish, Lepisosteus osseus', 'albatross, mollymawk']