| dip(noun, drop, decline, fall, depression) |
| basin(noun, drop, area, decline, fall) |
| depression(noun, drop, decline, fall, dish) |
| hollow(noun, drop, area, decline, fall) |
| concavity(noun, drop, decline, fall, depression) |
| excavation(noun, depression, impression, dip, hollow) |
| bowl(noun, depression, dish, impression, sink) |
| dimple(noun, depression, impression, dip, hollow) |
| gulf(noun, dish, sink, dip, pot) |
| hole(noun, drop, decline, fall, depression) |
| scoop(noun, depression, impression, dip, hollow) |
| sinkhole(noun, drop, decline, fall, depression) |
| valley(noun, depression, dish, impression, sink) |
| cavity(noun, impression, dip, hollow, pocket) |
| cleft(noun, dip, bottom, indentation) |
| crater(noun, depression, impression, dip, hollow) |
| indentation(noun, depression, impression, dip, hollow) |
| nook(noun, indentation, recess, cavity) |
| pit(noun, depression, impression, dip, hollow) |
| pocket(noun, depression, impression, dip, hollow) |