| 空洞无物 | kong1 dong4 wu2 wu4 | nothing new to show |
| 空洞造口术 | kong1 dong4 zao4 kou3 shu4 | cavernostomy |
| 管洞贝目 | guan3 dong4 bei4 mu4 | Siphonotretida |
| 管洞贝超科 | guan3 dong4 bei4 chao1 ke1 | Siphonotretacea |
| 肺空洞镜 | fei4 kong1 dong4 jing4 | cavernoscope |
| 洞庭湖 | dong4 ting2 hu2 | Dongting lake |
| 洞庭 | dong4 ting2 | |
| 隧洞 | sui4 dong4 | tunnel |
| 大浦洞 | da4 pu3 dong4 | Taepodong, North Korean rocket series |
| 洞鉴 | dong4 jian4 | to examine deeply |
| 空洞的 | kong1 dong4 de5 | inane |
| 进洞 | jin4 dong4 | |
| 别有洞天 | bie2 you3 dong4 tian1 | completely different world |