| 海滩 | hǎi tān | beach; CL:片 |
| 浅海 | qiǎn hǎi | shallow sea; sea less than 200 meters deep |
| 山海关 | Shān hǎi guān | Shanhai pass, the Eastern pass of the Great Wall; Shanhaiguan district of Qinhuangdao city 秦皇岛市, Hebei |
| 海上花列传 | hǎi shàng huā liè zhuàn | The Sing-Song Girls of Shanghai by Han Bangqing 韩邦庆, long novel of lower life in classical Chinese and Jiangsu vernacular; translated into Putonghua as 海上花 by Iris Chang |
| 海平面 | hǎi píng miàn | sea level |
| 北海道 | Běi hǎi dào | Hokkaidō, Japan |
| 海南 | Hǎi nán | Hainan Province, in the South China Sea, short name 琼, capital Haikou 海口; Hainan Island; Hainan District of Wuhai City 乌海市, Inner Mongolia; Hainan Tibetan Autonomous Prefecture 海南藏族自治州, Qinghai |
| 海盐 | Hǎi yán | Haiyan county in Jiaxing 嘉兴, Zhejiang |
| 深海 | shēn hǎi | deep sea |
| 山海经 | Shān Hǎi Jīng | Classic of Mountain and Sea, probably compiled c. 500 BC-200 BC, contains wide range of geography, mythology, witchcraft, popular customs etc |
| 海带 | hǎi dài | kelp |
| 海藻 | hǎi zǎo | seaweed; marine alga; kelp |
| 海鸥 | hǎi ōu | seagull |
| 海地 | Hǎi dì | Haiti, the western third of Caribbean island Hispaniola |
| 外海 | wài hǎi | offshore; open sea |
| 海战 | hǎi zhàn | naval battle |
| 海风 | hǎi fēng | sea breeze; sea wind (i.e. from the sea) |
| 海王星 | Hǎi wáng xīng | Neptune (planet) |
| 海盗行为 | hǎi dào xíng wéi | piracy |
| 咸海 | Xián Hǎi | Aral Sea |
| 下海 | xià hǎi | to go to sea; fig. to leave secure job (iron rice-bowl 铁饭碗) for sth better but more risky |
| 海船 | hǎi chuán | sea-going ship |
| 海马 | hǎi mǎ | sea horse |
| 海浪 | hǎi làng | sea wave |
| 威海 | Wēi hǎi | Weihai prefecture level city in Shandong |
| 波罗的海 | Bō luó dì Hǎi | Baltic Sea |
| 冼星海 | Xiǎn Xīng hǎi | Xian Xinghai (1905-1945), violinist and composer, known for patriotic wartime pieces, including Yellow River Oratorio 黄河大合唱 |
| 海波 | hǎi bō | hypo (loanword); sodium thiosulfate Na2S2O3 used in fixing photos (formerly hyposulfite) |
| 珠海 | Zhū hǎi | Zhuhai prefecture level city in Guangdong province 广东省 in south China |
| 西海 | Xī hǎi | western sea; Yellow Sea (from Korean perspective) |
| 海河 | Hǎi hé | Hai He (a system of five waterways around Tianjin, flowing into Bohai 渤海 at Dagukou 大沽口) |
| 海军陆战队 | hǎi jūn lù zhàn duì | marine corps; marines |
| 苦海 | kǔ hǎi | lit. sea of bitterness; abyss of worldly suffering (Buddhist term); depths of misery |
| 象牙海岸 | Xiàng yá hǎi àn | Ivory Coast, West Africa |
| 海涅 | Hǎi niè | Heinrich Heine (1797-1856), German lyric poet |
| 日本海 | Rì běn hǎi | Sea of Japan; Korean: East sea 东海 |
| 镇海 | Zhèn hǎi | Zhenhai district of Ningbo city 宁波市, Zhejiang |
| 海产 | hǎi chǎn | marine; produced in sea |
| 海龟 | hǎi guī | turtle |
| 排山倒海 | pái shān dǎo hǎi | lit. to topple the mountains and overturn the seas (idiom); earth-shattering; fig. gigantic; of spectacular significance |
| 海德 | Hǎi dé | Hyde (surname) |
| 长海 | Cháng hǎi | Changhai county in Dalian 大连, Liaoning |
| 加勒比海 | Jiā lè bǐ Hǎi | Caribbean Sea |
| 海北 | Hǎi běi | Haibei Tibetan autonomous prefecture in Qinghai |
| 海疆 | hǎi jiāng | coastal border region |
| 海相 | hǎi xiāng | marine facies (geology) |
| 海禁 | hǎi jìn | prohibition on entering or leaving by sea |
| 临海 | lín hǎi | to overlook the sea; on the waterfront; Linhai county level city in Taizhou 台州, Zhejiang |
| 英吉利海峡 | Yīng jí lì hǎi xiá | English Channel |
| 海损 | hǎi sǔn | damage to goods during shipping |
