| 大海 | dà hǎi | sea / ocean |   |
| 海 |  hǎi | ocean / sea / CL:個|个[ge4],片[pian4] / great number of people or things / (dialect) numerous | |
| 溟 | míng | to drizzle / sea | |
| 南海 | Nán Hǎi | South China Sea | |
| 东海 | Dōng Hǎi | East China Sea / East Sea (Chinese mythology and ancient geography) | |
| 海拔 | hǎi bá | height above sea level / elevation | |
| 海域 | hǎi yù | sea area / territorial waters / maritime space | |
| 海面 | hǎi miàn | the surface of the sea / ocean surface | |
| 滨海 | bīn hǎi | coastal / bordering the sea | |
| 海风 | hǎi fēng | sea breeze / sea wind (i.e. from the sea) | |
| 人海 | rén hǎi | a multitude / a sea of people | |
| 海运 | hǎi yùn | shipping by sea | |
| 深海 | shēn hǎi | deep sea | |
| 出海 | chū hǎi | to go out to sea / (neologism) to expand into overseas markets | |
| 海浪 | hǎi làng | sea wave | |
| 澎湃 | péng pài | (of the sea etc) surging / tempestuous / (fig.) highly emotional / fervent | |
| 海绵 | hǎi mián | (zoology) sea sponge / (esp.) dried sea sponge / sponge (made from polyester or cellulose etc) / foam rubber | |
| 海阔天空 | hǎi kuò tiān kōng | wide sea and sky (idiom) / boundless open vistas / the whole wide world / chatting about everything under the sun | |
| 渤海 | Bó Hǎi | Bohai Sea, or Bo Hai, between Liaoning and Shandong / Parhae, Korean kingdom in Manchuria and Siberia 698-926 | |
| 火海 | huǒ hǎi | a sea of flames | |
| 颠簸 | diān bǒ | to be jolted around (car on a bumpy road, boat on a rough sea, aircraft experiencing turbulence) / (fig.) to undergo a rough experience | |
| 下海 | xià hǎi | to go out to sea / to enter the sea (to swim etc) / (fig.) to take the plunge (e.g. leave a secure job, or enter prostitution etc) | |
| 临海 | lín hǎi | to overlook the sea / on the waterfront | |
| 人鱼 | rén yú | mermaid / dugong / sea cow / manatee / giant salamander | |
| 水仙 | shuǐ xiān | narcissus / daffodil / legendary aquatic immortal / refers to those buried at sea / person who wanders abroad and does not return | |
| 水浒 | shuǐ hǔ | edge of the water / shore or sea, lake or river / seashore | |
| 黄海 | Huáng Hǎi | Yellow Sea | |
| 海事 | hǎi shì | maritime affairs / accident at sea | |
| 海景 | hǎi jǐng | seascape / sea view | |
| 辽东 | Liáo dōng | Liaodong peninsula between Bohai 渤海 / and Yellow sea / east and south of Liaoning province / east of Liao river 遼河|辽河 | |
| 海战 | hǎi zhàn | sea warfare / naval battle | |
| 水陆 | shuǐ lù | water and land / by water and land (transport) / amphibian / delicacies from land and sea | |
| 水边 | shuǐ biān | edge of the water / waterside / shore (of sea, lake or river) | |
| 海马 | hǎi mǎ | sea horse / hippocampus (abbr. for 海馬體|海马体[hai3ma3ti3]) | |
| 东瀛 | Dōng yíng | (literary) East China Sea / (literary) Japan | |
| 海盐 | Hǎi yán | sea salt | |
| 苦海 | kǔ hǎi | lit. sea of bitterness / abyss of worldly suffering (Buddhist term) / depths of misery | |
| 波涛汹涌 | bō tāo xiōng yǒng | waves surging forth / roaring sea | |
| 龙宫 | lóng gōng | palace of the Dragon King at the bottom of the Eastern Sea | |
| 通航 | tōng háng | connected by air, sea traffic or service | |
| 海参 | hǎi shēn | sea cucumber | |
| 远航 | yuǎn háng | to travel a great distance by sea or air / voyage / long-haul flight | |
| 葬身 | zàng shēn | to bury a corpse / to be buried / (fig.) to die (at sea, in a fire etc) | |
| 海螺 | hǎi luó | sea snail / whelk / conch | |
| 海南岛 | Hǎi nán Dǎo | Hainan Island in South China Sea | |
| 海王 | Hǎi wáng | Poseidon, Greek god of the sea / Neptune, Roman god of the sea / Aquaman, DC comic book superhero / (slang) womanizer / player | |
| 学海 | xué hǎi | sea of learning / erudite / knowledgeable person / scholarship | |
| 海星 | hǎi xīng | starfish / sea star | |
| 海狮 | hǎi shī | sea lion | |
| 沧海桑田 | cāng hǎi sāng tián | lit. the blue sea turned into mulberry fields (idiom) / fig. the transformations of the world | |
| 西海 | Xī Hǎi | Yellow Sea (Korean term) | |
| 加勒比海 | Jiā lè bǐ Hǎi | Caribbean Sea | |
| 妈祖 | Mā zǔ | Matsu, name of a sea goddess still widely worshipped on the SE China coast and in SE Asia | |
| 水怪 | shuǐ guài | sea monster / aquatic monster | |
| 海产 | hǎi chǎn | marine / produced in sea | |
| 海平面 | hǎi píng miàn | sea level | |
| 独岛 | Dú dǎo | Dokdo (Japanese Takeshima 竹島|竹岛[Zhu2 dao3]), disputed islands in Sea of Japan | |
| 外海 | wài hǎi | offshore / open sea | |
| 死海 | Sǐ Hǎi | the Dead Sea | |
| 黑海 | Hēi Hǎi | Black Sea | |
| 日本海 | Rì běn Hǎi | Sea of Japan | |
| 波罗的海 | Bō luó dì Hǎi | Baltic Sea | |
| 海陆空 | hǎi lù kòng | sea land air (transport, or military operations) | |
| 瞒天过海 | mán tiān guò hǎi | to cross the sea by a trick (idiom) / to achieve one's aim by underhanded means | |
| 飒飒 | sà sà | soughing / whistling or rushing sound (of the wind in trees, the sea etc) | |
| 海陆 | hǎi lù | sea and land | |
| 石沉大海 | shí chén dà hǎi | lit. to throw a stone and see it sink without trace in the sea (idiom) / fig. to elicit no response | |
| 海难 | hǎi nàn | perils of the sea | |
| 里海 | Lǐ Hǎi | Caspian Sea | |
| 船运 | chuán yùn | sea freight / shipping | |
| 公海 | gōng hǎi | high sea / international waters | |
| 浩如烟海 | hào rú yān hǎi | vast as the open sea (idiom) / fig. extensive (library) | |
| 大海捞针 | dà hǎi lāo zhēn | lit. to fish a needle from the sea / to find a needle in a haystack (idiom) | |
| 中国海 | Zhōng guó Hǎi | the China Seas (the seas of the Western Pacific Ocean, around China: Bohai Sea, Yellow Sea, East China Sea, South China Sea) | |
| 浅海 | qiǎn hǎi | shallow sea / sea less than 200 meters deep | |
| 海胆 | hǎi dǎn | sea urchin | |
| 瀛洲 | Yíng zhōu | Yingzhou, easternmost of three fabled islands in Eastern sea, home of immortals and source of elixir of immortality | |
| 航次 | háng cì | air or sea voyage (seen as an individual, countable item) / flight / voyage / CL:個|个[ge4] | |
| 内海 | nèi hǎi | enclosed sea | |
| 西沙群岛 | Xī shā Qún dǎo | Paracel Islands, in the South China Sea | |
| 竹岛 | Zhú dǎo | Takeshima (Korean Dokdo 獨島|独岛[Du2 dao3]), disputed islands in Sea of Japan | |
| 海葵 | hǎi kuí | sea anemone | |
| 海运费 | hǎi yùn fèi | shipping / sea transport | |
| 试航 | shì háng | test flight (of aircraft) / sea trial (of ship) | |
| 泥牛入海 | ní niú rù hǎi | lit. a clay ox enters the sea (idiom) / fig. to disappear with no hope of returning | |
| 刘公岛 | Liú gōng Dǎo | Liugong island in the Yellow sea | |
| 海冰 | hǎi bīng | sea ice | |
| 蛇岛 | Shé dǎo | Shedao or Snake island in Bohai sea 渤海 / off Lüshun 旅順|旅顺 / on the tip of the Liaoning peninsula, small rocky island famous for snakes | |
| 罗斯托夫 | Luó sī tuō fū | Rostov-on-Don, Russian river port and regional capital close to Sea of Azov (north of the Black Sea) | |
| 海禁 | hǎi jìn | prohibition on entering or leaving by sea | |
| 李舜臣 | Lǐ Shùn chén | Yi Sunshin (1545-1598), Korean admiral and folk hero, famous for sea victories over the Japanese invaders | |
| 文山会海 | wén shān huì hǎi | a mountain of paperwork and a sea of meetings (idiom) | |
| 腓尼基 | féi ní jī | Phoenicia, ancient civilization along the coast of the Mediterranean Sea | |
| 内陆河 | nèi lù hé | inland river / river draining to inland sea | |
| 亚得里亚海 | Yà dé lǐ yà Hǎi | Adriatic Sea | |
| 海百合 | hǎi bǎi hé | sea lily / crinoid | |
| 咸海 | Xián Hǎi | Aral Sea | |
| 渤 | Bó | same as 渤海[Bo2 Hai3], Bohai Sea between Liaoning and Shandong / Gulf of Zhili or Chihli | |
| 鼋 | yuán | sea turtle | |
| 鼂 | cháo | sea turtle | |
