| 钻空 | zuan1 kong1 | |
| 挖空心思 | wa1 kong1 xin1 si1 | to rack one's brains |
| 空前绝后 | kong1 qian2 jue2 hou4 | unique |
| 空勤 | kong1 qin2 | |
| 崆峒 | kong1 tong2 | Kongtong district of Pingliang city 平涼市平凉市[Ping2 liang2 shi4], Gansu |
| 空对空 | kong1 dui4 ku4 | |
| 空巢 | kong1 chao2 | empty nest |
| 空格键 | kong1 ge2 jian4 kong4 ge2 jian4 | space bar (keyboard) |
| 空置 | kong1 zhi4 | unused |
| 空船 | kong1 chuan2 | |
| 空闺 | kong1 gui1 | |
| 两手空空 | liang3 shou3 kong1 kong1 | empty-handed (idiom) |
| 悾 | kong1 | sincere |