Definition of sea :
1. A great brazen laver in the temple at Jerusalem; - so called from its size.
2. An inland body of water, esp. if large or if salt or brackish; as, the Caspian Sea; the of Aral; sometimes, a small fresh- water lake; as, the of Galilee.
3. Fig.: Anything resembling the sea in vastness; as, a sea of glory.
4. One of the larger bodies of salt water, less than an ocean, found on the earth's surface; a body of salt water of second rank, generally forming part of, or connecting with, an ocean or a larger sea; as, the Mediterranean Sea; the Sea of Marmora; the North Sea; the Carribean Sea.
5. The ocean; the whole body of the salt water which covers a large part of the globe.
6. The swell of the ocean or other body of water in a high wind; motion of the water's surface; also, a single wave; a billow; as, there was a high sea after the storm; the vessel shipped a sea.
Azov, South China, deep-sea, Japan, Java, shipboard, Sulu, Mediterranean, Barents, Aegean, oversea, Yellow, East China, Coral, suboceanic, oceangoing, Black, Baltic, Arabian, offshore, Irish, overseas, seafaring, Ionian, Timor, Caspian, seagoing, North, subocean, Tyrrhenian, Philippine, Red, White, Norwegian, Dead, Adriatic, Caribbean, Okhotsk, Tasman, Celebes
oceanic (part of speech: adjective)
ocean (part of speech: noun)
water (part of speech: noun)