| 雷 | léi | thunder; (internet slang) terrifying; terrific; surname Lei |
| 雷雨 | léi yǔ | thunderstorm |
| 雷锋 | Léi Fēng | Lei Feng (1940-1962), young communist killed in an accident in 1962, used as a model in one of Mao's campaigns from 1963 |
| 雷达 | léi dá | radar (loanword) |
| 雷电 | léi diàn | thunder and lightning |
| 雷声 | léi shēng | thunder |
| 雷管 | léi guǎn | detonator; fuse |
| 雷击 | léi jī | lightning strike; thunderbolt |
| 雷诺 | Léi nuò | Reynolds (name); Renault (French car company); Reno, Nevada |
| 雷鸣 | léi míng | thunder; very loud sounds |
| 雷同 | léi tóng | mirroring others; identical |
| 雷阵雨 | léi zhèn yǔ | thunder shower |
| 雷诺数 | Léi nuò shù | Reynolds number (ratio of inertial forces to viscous forces in fluid mechanics) |
| 雷峰塔 | léi fēng tǎ | Leifeng Pagoda, by West Lake until it was destroyed (also from Madam White Snake) |
| 雷霆 | léi tíng | sound of thunder |
| 雷州半岛 | Léi zhōu bàn dǎo | Leizhou Peninsula |
| 雷・罗马诺 | Léi · Luó mǎ nuò | Ray Romano (1957-), US actor and comedian |
| 雷人 | léi rén | (internet slang) shocking; appalling; terrifying; terrific |
| 雷克斯 | léi kè sī | Rex (name) |
| 雷克斯暴龙 | léi kè sī bào lóng | Tyrannosaurus rex |
| 雷克萨斯 | Léi kè sà sī | Lexus; see also 凌志 |
| 雷克雅维克 | Léi kè yǎ wéi kè | Reykjavik, capital of Iceland |
| 雷公 | Léi Gōng | Lei Gong or Duke of Thunder, the God of Thunder in Chinese mythology |
| 雷公打豆腐 | Léi Gōng dǎ dòu fu | the God of Thunder strikes bean curd; fig. to bully the weakest person; to pick on an easy target |
雷公打豆腐，
拣软的欺 | Léi Gōng dǎ dòu fu ,
jiǎn ruǎn de qī | the God of Thunder strikes bean curd, a bully picks the weakest person; to pick on an easy target |
| 雷厉风行 | léi lì fēng xíng | pass like thunder and move like the wind (idiom); swift and decisive reaction |
| 雷大雨小 | léi dà yǔ xiǎo | lit. much thunder but little rain; fig. a lot of talk but little action; his bark is worse than his bite |
| 雷姆斯汀 | Léi mǔ sī tīng | variant of 德国战车, Rammstein (German metal band) |
| 雷射 | léi shè | laser (loanword used in Taiwan); also written 镭射 |
| 雷山 | Léi shān | Leishan county in Qiandongnan Miao and Dong autonomous prefecture 黔东南州, Guizhou |
| 雷山县 | Léi shān xiàn | Leishan county in Qiandongnan Miao and Dong autonomous prefecture 黔东南州, Guizhou |
| 雷州 | Léi zhōu | Leizhou county level city in Zhanjiang 湛江, Guangdong |
| 雷州市 | Léi zhōu shì | Leizhou county level city in Zhanjiang 湛江, Guangdong |
| 雷德 | Léi dé | Clark T. Randt Jr. (1945-), US ambassador to Beijing since 2001 |
| 雷恩 | Léi ēn | Rennes |
| 雷扎耶湖 | Léi zhá yē hú | lake Urmiyeh, northwest Iran, a major salt lake; formerly called lake Rezaiyeh |
| 雷打不动 | léi dǎ bù dòng | not shaken by thunder (idiom);the arrangements are unalterable; to adhere rigidly to regulations; will go ahead whatever happens (of an arrangement or plan) |
| 雷日纳 | Léi rì nà | Regina (name); Regina, city in Brazil |
| 雷暴 | léi bào | thunderstorm |
| 雷曼 | Léi màn | Lehman or Leymann (name) |
| 雷曼兄弟 | Léi màn xiōng dì | Lehman brothers, investment bank |
| 雷朗 | Léi lǎng | Luilang, one of the indigenous peoples of Taiwan |
| 雷朗族 | Léi lǎng zú | Luilang, one of the indigenous peoples of Taiwan |
| 雷根 | Léi gēn | Reagan (name); Ronald Reagan (1911-2004), US president (1981-1989) |
| 雷波 | Léi bō | Leibo county in Liangshan Yi autonomous prefecture 凉山彝族自治州, south Sichuan |
| 雷波县 | Léi bō xiàn | Leibo county in Liangshan Yi autonomous prefecture 凉山彝族自治州, south Sichuan |
| 雷神公司 | Léi shén Gōng sī | Raytheon Company, US defense contractor |
雷声大，
雨点小 | léi shēng dà ,
yǔ diǎn xiǎo | loud thunder, but only tiny drops of rain (idiom); a lot of talk, but no action; action speaks louder than words; his bite is worse than his bark |
| 雷蒙德 | léi méng dé | (name) Raymond |
| 雷盖 | léi gài | reggae; also written 雷鬼 |
