| 龙 |
lóng dòng | cave / natural cavern (in limestone) |
| 龙 |
Lóng | surname Long |
| 龙 |
lóng | Chinese dragon; loong / (fig.) emperor / dragon / (bound form) dinosaur |
| 洞 |
dòng | cave / hole / zero (unambiguous spoken form when spelling out numbers) / CL:个 |
| 洞 |
tóng | used in 洪洞, a county in Shanxi |