| Main Entry: | |
| Part of Speech: | noun |
| Definition: | hole in land formation |
| Synonyms: | cavern, cavity, den, grotto, hollow, pothole, rock shelter, subterrane, subterranean area |
| Notes: | cavern is more vague and rhetorical than cave; a cavern is a large cave |
| Main Entry: | cellar |
| Part of Speech: | noun |
| Definition: | underground story of building |
| Synonyms: | apartment, basement, subbasement, subterrane, underground room, vault |
| Notes: | a cellar is a storage place, usually underground, for foodstuffs etc; basement is the lowest story of a building, part or wholly below ground level |
| Antonyms: | attic |
| Main Entry: | grotto |
| Part of Speech: | noun |
| Definition: | cave |
| Synonyms: | antre, cavern, cavity, chamber, den, hollow, rock shelter, subterrane, underground chamber |