| pit(noun, depression, supply, impression, drain) |
| cavity(noun, break, cut, crack, score) |
| hole(noun, depression, score, impression, opening) |
| hollow(noun, break, area, depression, score) |
| depression(noun, break, impression, drain, well) |
| trough(noun, drain, ditch, bottom) |
| crater(noun, break, cut, crack, depression) |
| indentation(noun, depression, impression, well) |
| dent(noun, break, cut, crack, depression) |
| concavity(noun, depression, impression, hollow) |
| valley(noun, depression, impression, hollow) |
| basin(noun, depression, impression, hollow) |
| channel(noun, score, drain, scratch) |
| cleft(noun, break, cut, crack, opening) |
| dimple(noun, break, cut, crack, depression) |
| gulf(noun, well, hole, hollow) |
| impression(noun, depression, hollow, pocket) |
| sinkage(noun, depression, impression, hollow) |
| sinkhole(noun, depression, impression, hollow) |
| void(noun, break, cut, crack, depression) |