| 海 | hǎi | ocean; sea; CL:个,片 |
| 上海 | Shàng hǎi | Shanghai municipality, central east China, abbr. to 沪 |
| 沿海 | yán hǎi | coastal |
| 海军 | hǎi jūn | navy |
| 海上 | hǎi shàng | maritime |
| 海水 | hǎi shuǐ | seawater |
| 领海 | lǐng hǎi | territorial waters |
| 海外 | hǎi wài | overseas; abroad |
| 青海 | Qīng hǎi | Qinghai province (Tsinghai) in west China, abbr. 青, capital Xining 西宁 |
| 航海 | háng hǎi | sailing; navigation; voyage by sea |
| 海底 | hǎi dǐ | seabed; seafloor; bottom of the ocean |
| 海关 | hǎi guān | customs (i.e. border crossing inspection); CL:个 |
| 海面 | hǎi miàn | sea level; sea surface |
| 海湾 | hǎi wān | bay; gulf (body of water); (Persian) Gulf |
| 海岸 | hǎi àn | coastal; seacoast |
| 北海 | Běi hǎi | Beihai, park in Beijing to the Northwest the Forbidden City; the North Sea (Europe); Beihai prefecture level city and seaport in Guangxi; Bohai Sea; Lake Baikal |
| 东海 | Dōng hǎi | East China sea |
| 海里 | hǎi lǐ | nautical mile; marine |
| 地中海 | Dì zhōng hǎi | Mediterranean sea |
| 南海 | Nán hǎi | South China Sea |
| 大海 | dà hǎi | sea; ocean |
| 海峡 | hǎi xiá | channel; strait |
| 海南岛 | Hǎi nán dǎo | Hainan Island in South China Sea |
| 海域 | hǎi yù | sea area; territorial waters; maritime space |
| 渤海 | Bó Hǎi | Bohai sea between Liaoning and Shandong; Parhae, Korean kingdom in Manchuria and Siberia 698-926 |
| 海港 | hǎi gǎng | seaport; harbor |
| 公海 | gōng hǎi | high sea; international waters |
| 海牙 | Hǎi yá | The Hague (city in the Netherlands); Den Haag |
| 出海 | chū hǎi | to go out to sea |
| 滨海 | bīn hǎi | coastal; bordering the sea; Binhai (place name); Binhai New District, subprovincial district of Tianjin; Binhai county in Yancheng 盐城, Jiangsu; fictitious city Binhai in political satire |
| 红海 | Hóng Hǎi | Red Sea |
| 海运 | hǎi yùn | shipping by sea |
| 黄海 | Huáng hǎi | Yellow Sea |
| 海参 | hǎi shēn | sea cucumber |
| 里海 | Lǐ Hǎi | Caspian Sea |
| 海员 | hǎi yuán | sailor; mariner |
| 海盗 | hǎi dào | pirate |
| 脑海 | nǎo hǎi | the mind; the brain |
| 海边 | hǎi biān | seaside |
| 黑海 | Hēi Hǎi | Black Sea |
| 学海 | xué hǎi | sea of learning; erudite; knowledgeable person; scholarship |
| 海岛 | hǎi dǎo | island |
| 海滨 | hǎi bīn | shore; seaside |
| 海岸线 | hǎi àn xiàn | coastline; seaboard; shoreline |
| 海内 | hǎi nèi | the whole world; throughout the land; everything under the sun |
| 海绵 | hǎi mián | sponge |
| 近海 | jìn hǎi | coastal waters; offshore |
| 海防 | hǎi fáng | coastal defense |
| 海口 | hǎi kǒu | estuary; coastal inlet; river mouth; seaport; see also 夸海口; Haikou prefecture-level city and capital of Hainan Province 海南省 |
| 定海 | Dìng hǎi | Dinghai district of Zhoushan city 舟山市, Zhejiang; Qing dynasty name of 舟山市 |
