Roget's Thesaurus

#341. Ocean

Nouns

sea, ocean, main, deep, brine, salt water, waves, billows, high seas, offing, great waters, watery waste, vasty deep; wave, tide, etc. (water in motion) 348. hydrography, hydrographer; Neptune, Poseidon, Thetis, Triton, Naiad, Nereid; sea nymph, Siren; trident, dolphin.

Adjectives

oceanic; marine, maritime; pelagic, pelagian; seagoing; hydrographic; bathybic, cotidal.

Adverbs

at sea, on sea; afloat.