bathyscaphe, submersible, periscope, cavelike, lazarette, porthole, belowdecks, subspace, eldritch, aquanaut, conning tower, bathyscaph, wormhole, tidepool, underwater, vortex, lanternfish, sextants, teleporter, sandworm, darkling, subaquatic, spume, retroreflector, poop deck, tartarus, ectoplasm, spaceship, hyperspace, trireme, photomosaic, aether, echo sounder, earthwards, aqualung, abyssal, chambered nautilus, doorless, antarctic, forecastle, horsehead nebula, insectlike, toroid, hydrophone, frogman, nostromo, mermen, wormlike, dirigible, whaleback, doppler effect, moray eel, ocean, soliton, batlike, midships, laputa, snailfish, propeller, moonlike, spelunk, philae, paramecia, divers, airlocks, pequod, hatchway, cavern, tramp steamer, tachyon, aeronaut, airship, glider, cryostat, microphysics, glowworm, cenobites, plutonian, cloudscape, eerie, briney, sundog, corpuscular, companionway, sastrugi, lunar module, trilobite, monoplanes, quarterdeck, caravel, gimbals, planetoids, sidewise, spectroscope, hydrosphere, davits, semidarkness, nitrogen narcosis, submergible, stereographic, argonauts, nekton