| 1 | 空气 | 空氣 | kōng qì | kong1 qi4 | air; atmosphere | | |
| 2 | 空间 | 空間 | kōng jiān | kong1 jian1 | space; room; (fig.) scope; leeway; (astronomy) outer space; (physics, math.) space | | |
| 3 | 天空 | 天空 | tiān kōng | tian1 kong1 | sky | | |
| 4 | 空 | 空 | kōng | kong1 | empty; air; sky; in vain | | |
| 5 | 空中 | 空中 | kōng zhōng | kong1 zhong1 | in the sky; in the air | | |
| 6 | 上空 | 上空 | shàng kōng | shang4 kong1 | overhead; in the sky | | |
| 7 | 空前 | 空前 | kōng qián | kong1 qian2 | unprecedented | | |
| 8 | 高空 | 高空 | gāo kōng | gao1 kong1 | high altitude | | |
| 9 | 航空 | 航空 | háng kōng | hang2 kong1 | aviation | | |
| 10 | 太空 | 太空 | tài kōng | tai4 kong1 | outer space | | |
| 11 | 空军 | 空軍 | kōng jūn | kong1 jun1 | air force | | |
| 12 | 时空 | 時空 | shí kōng | shi2 kong1 | time and place; world of a particular locale and era; (physics) space-time | | |
| 13 | 空虚 | 空虛 | kōng xū | kong1 xu1 | hollow; emptiness; meaningless | | |
| 14 | 真空 | 真空 | zhēn kōng | zhen1 kong1 | vacuum | | |
| 15 | 孙悟空 | 孫悟空 | sūn wù kōng | Sun1 Wu4 kong1 | Sun Wukong, the Monkey King, character with supernatural powers in the novel Journey to the West 西游记 | | |
| 16 | 空想 | 空想 | kōng xiǎng | kong1 xiang3 | daydream; fantasy; to fantasize | | |
| 17 | 空地 | 空地 | kōng dì | kong1 di4 | air-to-surface (missile) | | |
| 18 | 夜空 | 夜空 | yè kōng | ye4 kong1 | night sky | | |
| 19 | 空洞 | 空洞 | kōng dòng | kong1 dong4 | cavity; empty; vacuous | | |
| 20 | 空话 | 空話 | kōng huà | kong1 hua4 | empty talk; bunk; malicious gossip | | |
| 21 | 空位 | 空位 | kōng wèi | kong1 wei4 | empty place; room (for sb) | | |
| 22 | 空心 | 空心 | kōng xīn | kong1 xin1 | hollow; (of vegetables) to become hollow or spongy inside; (of a basketball) to swish through (not touching the hoop) | | |
| 23 | 坐吃山空 | 坐吃山空 | zuò chī shān kōng | zuo4 chi1 shan1 kong1 | lit. just sitting and eating, one can deplete even a mountain of wealth (idiom); fig. to spend one's money without generating any income | | |
| 24 | 空口无凭 | 空口無憑 | kōng kǒu wú píng | kong1 kou3 wu2 ping2 | mere verbal statement cannot be taken as proof (idiom) | | |
| 25 | 空中分列 | 空中分列 | kōng zhōng fēn liè | kong1 zhong1 fen1 lie4 | (military) flyover | | |