| 洞 |  dòng | cave / hole / zero (unambiguous spoken form when spelling out numbers) / CL:個|个[ge4] |   |
| 山洞 | shān dòng | cavern / cave | |
| 洞穴 | dòng xué | cave / cavern | |
| 洞窟 | dòng kū | a cave | |
| 地洞 | dì dòng | tunnel / cave / burrow / dugout | |
| 石洞 | shí dòng | cave / cavern | |
| 龙洞 | lóng dòng | cave / natural cavern (in limestone) | |
| 阴穴 | yīn xué | cave / (coll.) vagina | |
| 岩穴 | yán xué | grotto / cave | |
| 穴 | xué | cave / cavity / hole / acupuncture point / Taiwan pr. [xue4] | |
| 窟 | kū | cave / hole | |
| 峒 | dòng | cave / cavern | |
| 岫 | xiù | cave / mountain peak | |
| 堀 | kū | cave / hole | |
| 硐 | dòng | variant of 洞[dong4] / cave / pit | |
| 窞 | dàn | pit / cave | |
| 峇 | kē | cave | |
| 屇 | tián | cave / hole | |
| 热室 | rè shì | hot cell / hot cave / cave | |
| 峇 | kè | cave / cavern / also pr. [ke1] | |
| 洞子 | dòng zi | cave / pit / (coll.) greenhouse | |
| 洞口 | dòng kǒu | cave mouth / tunnel entrance | |
| 石窟 | shí kū | rock cave / grotto / cliff caves (often with Buddhist statues) | |
| 凹陷 | āo xiàn | to cave in / hollow / sunken / depressed | |
| 塌陷 | tā xiàn | to subside / to sink / to cave in | |
| 溶洞 | róng dòng | (geology) solutional cave (typically, a limestone cave) | |
| 沉降 | chén jiàng | to subside / to cave in / subsidence | |
| 塌方 | tā fāng | to cave in / to collapse / to have a landslide | |
| 洞府 | dòng fǔ | cave dwelling / legendary abode of immortals | |
| 须弥 | Xū mí | Mt Meru or Sumeru, sacred mountain in Buddhist and Jain tradition / Mt Xumi in Guyuan 固原[Gu4 yuan2], Ningxia, with many Buddhist cave statues | |
| 窑洞 | yáo dòng | yaodong (a kind of cave dwelling in the Loess Plateau in northwest China) / CL:孔[kong3] | |
| 水帘洞 | Shuǐ lián Dòng | cave with a waterfall at its mouth | |
| 沉陷 | chén xiàn | to sink / to cave in / (of a building etc) to subside / (fig.) to get lost (in contemplation, daydreams etc) | |
| 顶板 | dǐng bǎn | roof / roof plate / rock layer forming roof of a cave or mine / abacus | |
| 穴居 | xué jū | to live in a cave / (of animals) to be of burrowing habit | |
| 穴居人 | xué jū rén | cave man | |
| 陷 | xiàn | pitfall / trap / to get stuck / to sink / to cave in / to frame (false charge) / to capture (a city in battle) / to fall (to the enemy) / defect | |
| 孔 | kǒng | hole / CL:個|个[ge4] / classifier for cave dwellings | |
| 碉 | diāo | rock cave (archaic) | |
| 空穴来风 | kōng xué lái fēng | lit. wind from an empty cave (idiom) / fig. unfounded (story) / baseless (claim) | |
| 空洞无物 | kōng dòng wú wù | empty cave, nothing there (idiom) / devoid of substance / nothing new to show | |
| 土窑 | tǔ yáo | earthen kiln / loess cave | |
| 崩陷 | bēng xiàn | to fall in / to cave in | |
| 崩毁 | bēng huǐ | to collapse / to cave in | |
| 托拉博拉 | Tuō lā bó lā | Tora Bora, cave complex in the White Mountains of eastern Afghanistan | |
| 挖穴 | wā xué | to excavate / to dig out a cave | |
| 空穴来风未必无因 | kòng xué lái fēng wèi bì wú yīn | wind does not come from an empty cave without reason / there's no smoke without fire (idiom) | |
| 藏经洞 | zàng jīng dòng | cave holding scripture depository, part of Mogao cave complex 莫高窟, Dunhuang 敦煌 | |
| 须弥山 | Xū mí shān | Mt Meru or Sumeru, sacred mountain in Buddhist and Jain tradition / Mt Xumi in Guyuan 固原[Gu4 yuan2], Ningxia, with many Buddhist cave statues | |
| 风穴 | fēng xué | wind cave | |
| 冒顶 | mào dǐng | (mining) roof fall / to have the roof cave in | |
