| 100% | DAM | 3 | Structure that blocks a river |
| 94% | DAM | 3 | Structure that blocks a river's current |
| 72% | DAM | 3 | Engineering project that blocks a river |
| 71% | DAM | 3 | Barrier that blocks a river's flow |
| 69% | DAM | 3 | Structure that turns a river into a lake |
| 67% | BARRIER | 7 | Structure that blocks one's way to a car park |
| 66% | DAM | 3 | Structure that holds back a river |
| 65% | DAM | 3 | Structure that generates electric power from a river |
| 57% | BRIDGE | 6 | A structure over a river that you cross |
| 57% | DAMS | 4 | Structures that block water |
| 57% | RETAININGWALLS | 14 | Structures that block soil |
| 56% | DAMMING | 7 | Blocking a river's flow |
| 54% | DAM | 3 | Structure that blocks the flow of water |
| 54% | BRIDGE | 6 | Structure for crossing a river |
| 52% | DAM | 3 | Man-made structure that blocks water flow |
| 52% | DAMS | 4 | Structures that stop river currents |
| 52% | DAM | 3 | Structure that creates a reservoir |
| 51% | DAM | 3 | Structure that might create a lake |
| 51% | DAMS | 4 | Structures that beavers build in rivers |
| 50% | AFRAME | 6 | Structure that's roughly a triangular prism |
| 50% | DAM | 3 | Structure that may form a 55-Down |
| 50% | DAM | 3 | Structure that could prevent a flash flood |
| 50% | CATTREE | 7 | Structure that may include a scratching post |
| 50% | DAM | 3 | Structure that might prevent a flash flood |
| 49% | SILO | 4 | Structure that may store grain or a missile |
| 49% | ROOF | 4 | Structure that covers the top of a building |
| 49% | HOOVERDAM | 9 | Structure that holds back the Colorado River in US |
| 48% | NEST | 4 | Structure that a barn swallow makes out of mud |
| 48% | ORGANS | 6 | Structures that perform a special task in the body |
| 48% | STAGNANT | 8 | Like a river that has stopped moving |