| 1 | 海洋 | 海洋 | hǎi yáng | hai3 yang2 | Haiyang county level city in Yantai 烟台 , Shandong; ocean; Classifiers: 个 | | |
| 2 | 海水 | 海水 | hǎi shuǐ | hai3 shui3 | seawater | | |
| 3 | 海 | 海 | hǎi | hai3 | ocean; sea; Classifiers: 个 ; great number of people or things; (dialect) numerous; surname Hai | | |
| 4 | 海上 | 海上 | hǎi shàng | hai3 shang4 | maritime | | |
| 5 | 海军 | 海軍 | hǎi jūn | hai3 jun1 | navy | | |
| 6 | 海面 | 海面 | hǎi miàn | hai3 mian4 | sea level; sea surface | | |
| 7 | 海底 | 海底 | hǎi dǐ | hai3 di3 | seabed; seafloor; bottom of the ocean | | |
| 8 | 海岸 | 海岸 | hǎi àn | hai3 an4 | coastal; seacoast | | |
| 9 | 海拔 | 海拔 | hǎi bá | hai3 ba2 | height above sea level; elevation | | |
| 10 | 海外 | 海外 | hǎi wài | hai3 wai4 | overseas; abroad | | |
| 11 | 海南 | 海南 | hǎi nán | Hai3 nan2 | Hainan Province, in the South China Sea, short name 琼 , Qinghai | | |
| 12 | 海域 | 海域 | hǎi yù | hai3 yu4 | giant taro (Alocasia macrorrhizos); common calla; sea area; territorial waters; maritime space | | |
| 13 | 海带 | 海帶 | hǎi dài | hai3 dai4 | Haidai, historical region extending from the Bohai Sea to Mt Tai in Shandong; student who has returned from overseas but is yet to find a job (pun on 海带 ); cf. 海归 ; kelp | | |
| 14 | 海关 | 海關 | hǎi guān | hai3 guan1 | customs (i.e. border crossing inspection); Classifiers: 个 | | |
| 15 | 海南岛 | 海南島 | hǎi nán dǎo | Hai3 nan2 Dao3 | Hainan Island in South China Sea | | |
| 16 | 海湾 | 海灣 | hǎi wān | Hai3 wan1 | bay; gulf; (Persian) Gulf | | |
| 17 | 海瑞 | 海瑞 | hǎi ruì | Hai3 rui4 | Hai Rui (1514-1587), Ming politician, famous for honesty and integrity; Hairui township in Taitung County 台东县 , southeast Taiwan | | |
| 18 | 海滩 | 海灘 | hǎi tān | hai3 tan1 | beach; Classifiers: 片 | | |
| 19 | 海峡 | 海峽 | hǎi xiá | hai3 xia2 | channel; strait | | |
| 20 | 海浪 | 海浪 | hǎi làng | hai3 lang4 | sea wave | | |
| 21 | 海港 | 海港 | hǎi gǎng | hai3 gang3 | seaport; harbor | | |
| 22 | 海边 | 海邊 | hǎi biān | hai3 bian1 | coast; seaside; seashore; beach | | |
| 23 | 海滨 | 海濱 | hǎi bīn | hai3 bin1 | shore; seaside | | |
| 24 | 海岛 | 海島 | hǎi dǎo | hai3 dao3 | island | | |
| 25 | 海鸥 | 海鷗 | hǎi ōu | hai3 ou1 | (bird species of China) mew gull (Larus canus) | | |