ROGET THESAURUS
hydrography
Ocean
N
sea, ocean, main, deep, brine, salt water, waves, billows, high seas, offing, great waters, watery waste, vasty deep, wave, tide,
hydrography, hydrographer, Neptune, Poseidon, Thetis, Triton, Naiad, Nereid, sea nymph, Siren, trident, dolphin, oceanic, marine, maritime, pelagic, pelagian, seagoing, hydrographic, bathybic, cotidal, at sea, on sea, afloat.