| Similarity | Rank | |
|---|---|---|
| waterlogging | 0.713 | 41903 |
| irrigation | 0.701 | 13119 |
| rainwater | 0.695 | 16454 |
| silting | 0.679 | 58043 |
| watercourse | 0.673 | 22216 |
| draining | 0.663 | 35519 |
| afforestation | 0.661 | 25942 |
| reservoir | 0.661 | 5651 |
| topsoil | 0.661 | 23559 |
| roughland | 0.659 | 71546 |
| overgrazing | 0.655 | 43790 |
| aeration | 0.650 | 27937 |
| sewage | 0.649 | 6966 |
| ground-water | 0.646 | 71264 |
| reseeding | 0.645 | 65057 |
| sewer | 0.645 | 10047 |
| humus | 0.641 | 34081 |
| outfall | 0.641 | 28169 |
| soakaway | 0.640 | 47689 |
| erosion | 0.639 | 5070 |
| replanting | 0.638 | 44015 |
| groundwater | 0.637 | 12650 |
| fuelwood | 0.635 | 39541 |
| silt | 0.634 | 13817 |
| two-pipe | 0.634 | 98950 |