| Similarity | Rank | |
|---|---|---|
| insecticide | 0.855 | 17152 |
| fungicide | 0.847 | 25448 |
| lindane | 0.824 | 67136 |
| ddt | 0.821 | 35026 |
| dieldrin | 0.811 | 57671 |
| atrazine | 0.807 | 78097 |
| malathion | 0.806 | 55530 |
| fertiliser | 0.802 | 9071 |
| weedkiller | 0.798 | 34367 |
| defoliant | 0.793 | 73950 |
| overgrazing | 0.793 | 43790 |
| fertilizer | 0.792 | 11561 |
| organo-chloride | 0.788 | 97671 |
| organochlorine | 0.785 | 48475 |
| agro-chemical | 0.780 | 60833 |
| pesticide | 0.779 | 6857 |
| aldrin | 0.779 | 81928 |
| nitrogenous | 0.776 | 52585 |
| eutrophication | 0.776 | 42648 |
| polychlorinate | 0.772 | 45744 |
| paraquat | 0.766 | 68444 |
| reseeding | 0.748 | 65057 |
| bollworm | 0.744 | 85288 |
| carcinogen | 0.742 | 23531 |
| nitrogen-fixing | 0.742 | 66398 |