| cave | (noun) a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea | - |
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| (verb) explore natural caves | Synonyms: spelunk |
| (verb) hollow out as if making a cave or opening | Synonyms: undermine |
| caveat | (noun) a warning against certain acts | Synonyms: caution |
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| (noun) (law) a formal notice filed with a court or officer to suspend a proceeding until filer is given a hearing | - |
| caveman | (noun) someone who lives in a cave | Synonyms: cave dweller, cave man, troglodyte |
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| cavern | (noun) a large cave or a large chamber in a cave | - |
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| (noun) any large dark enclosed space | - |
| (verb) hollow out as if making a cavern | Synonyms: cavern out |
| cavernous | (adjective) filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood | Synonyms: erectile |
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| (adjective) being or suggesting a cavern | - |
| cavetto | (noun) a concave molding shaped like a quarter circle in cross section | - |
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