| Answer | Crossword Clue |
|---|---|
| CAVE | Hollow in the earth |
| cave | hollow space in the earth |
| caves | hollow space in the earth |
| corers | device having a hollow cylindrical drill or tube, used for taking samples of earth, rock, etc., from below the surface of the ground or ocean bottom |
| corer | device having a hollow cylindrical drill or tube, used for taking samples of earth, rock, etc., from below the surface of the ground or ocean bottom |
| dig | hollow out or form by removing earth excavate dig a hole |
