| 海森伯 | Hǎi sēn bó | Werner Heisenberg (1901-1976), German physicist |
| 海森堡 | Hǎi sēn bǎo | Werner Heisenberg (1901-1976), German physicist; also written 海森伯 |
| 海榴 | hǎi liú | pomegranate |
| 海归 | hǎi guī | returnee; student returning after study abroad |
| 海水倒灌 | hǎi shuǐ dào guàn | saltwater intrusion |
| 海水养殖 | hǎi shuǐ yǎng zhí | aquaculture |
| 海法 | Hǎi fǎ | Haifa (city in Israel) |
| 海洋学 | hǎi yáng xué | oceanography |
| 海洋性 | hǎi yáng xìng | maritime |
| 海洋性气候 | hǎi yáng xìng qì hòu | maritime climate |
| 海洋性贫血 | hǎi yáng xìng pín xuè | thalassemia |
| 海洋温差发电 | hǎi yáng wēn chā fā diàn | ocean thermal energy conversion (OTEC) |
| 海洋温度 | hǎi yáng wēn dù | ocean temperature |
| 海洛因 | hǎi luò yīn | heroin |
| 海洛英 | hǎi luò yīng | heroin (narcotic) (loanword) |
| 海淀图书城 | Hǎi diàn tú shū chéng | Haidian book city |
| 海港区 | Hǎi gǎng qū | harbor district; Haigang district of Qinhuangdao city 秦皇岛市, Hebei |
| 海沟 | hǎi gōu | marine trench |
| 海沧 | Hǎi cāng | Haicang district of Xiamen city 厦门市 (Amoy), Fujian |
| 海沧区 | Hǎi cāng qū | Haicang district of Xiamen city 厦门市 (Amoy), Fujian |
| 海淀 | Hǎi diàn | Haidian inner district of northeast Beijing, includes Beijing University, Tsinghua University 清华大学 and Zhongguancun 中关村 |
| 海淀区 | Hǎi diàn qū | Haidian inner district of northeast Beijing, includes Beijing University, Tsinghua University 清华大学 and Zhongguancun 中关村 |
| 海湾国家 | hǎi wān guó jiā | Nations of the Persian Gulf; Gulf states |
| 海湾战争 | Hǎi wān Zhàn zhēng | (Persian) Gulf War |
| 海尔 | Hǎi ěr | Haier (PRC household appliance brand); Hale (name) |
| 海尔德兰 | hǎi ěr dé lán | Gelderland |
| 海牛 | hǎi niú | manatee |
| 海狗 | hǎi gǒu | fur seal |
| 海狸 | hǎi lí | beaver |
| 海狮 | hǎi shī | sea lion |
| 海獭 | hǎi tǎ | sea otter |
| 海珠 | Hǎi zhū | Haizhu district of Guangzhou city 广州市, Guangdong |
| 海珠区 | Hǎi zhū qū | Haizhu district of Guangzhou city 广州市, Guangdong |
| 海瑞 | Hǎi ruì | Hairui township in Taitung county 台东县, southeast Taiwan; Hai Rui (1514-1587), Ming politician, famous for honesty and integrity |
| 海瑞罢官 | Hǎi Ruì bà guān | Hai Rui dismissed from office, 1960 historical play by historian Wu Han 吴晗 |
| 海瑞乡 | Hǎi ruì xiāng | Hairui township in Taitung county 台东县, southeast Taiwan |
| 海登 | Hǎi dēng | Hayden or Haydn (name) |
| 海百合 | hǎi bǎi hé | sea lily; crinoid |
| 海相沉积物 | hǎi xiāng chén jī wù | oceanic sediment (geology) |
| 海砂 | hǎi shā | sea sand (sand collected from the ocean floor, as opposed to that which is used as an ingredient in concrete) |
| 海砂屋 | hǎi shā wū | house built with cheap, unreliable concrete which contains a high quantity of sea sand; see also 海砂 |
| 海神 | hǎi shén | Emperor of the Sea; Neptune |
| 海空军 | hǎi kōng jūn | navy and air force |
| 海空军基地 | hǎi kōng jūn jī dì | naval and air military base |
| 海端 | Hǎi duān | Haiduan or Haituan township in Taitung county 台东县, southeast Taiwan |
| 海端乡 | Hǎi duān xiāng | Haiduan or Haituan township in Taitung county 台东县, southeast Taiwan |
| 海米 | hǎi mǐ | dried shrimps |
| 海纳百川 | hǎi nà bǎi chuān | all rivers run into the sea; use different means to obtain the same result (idiom) |
| 海绵宝宝 | Hǎi mián bǎo bǎo | SpongeBob SquarePants (US TV animated series, 1999-) |
| 海绵状 | hǎi mián zhuàng | spongy |
