| Main Entry: | grotto |
| Part of Speech: | noun |
| Definition: | cave |
Synonyms: |
antre, cavern, cavity, chamber, den, hollow, rock shelter, subterrane, underground chamber |
| Main Entry: | cave |
| 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: | cavern |
| Part of Speech: | noun |
| Definition: | hollow in land formation |
Synonyms: |
cave, grotto, hole, pothole, subterrane, subterranean area |
| Main Entry: | crypt |
| Part of Speech: | noun |
| Definition: | burial place |
Synonyms: |
catacomb, cave, cavern, cell, chamber, compartment, grave, grotto, mausoleum, room, sepulcher, tomb, undercroft, vault |
| Main Entry: | catacomb |
| Part of Speech: | noun |
| Definition: | underground tunnel |
Synonyms: |
cave, chamber, crypt, grotto, passageway |