| Similarity | Rank | |
|---|---|---|
| radio-active | 0.782 | 71832 |
| radioactive | 0.776 | 6851 |
| fall-out | 0.773 | 26093 |
| contamination | 0.754 | 7877 |
| ozone-damaging | 0.748 | 88642 |
| alloprene | 0.745 | 83778 |
| seveso | 0.740 | 45819 |
| aral | 0.738 | 56674 |
| defoliation | 0.735 | 62141 |
| dioxin | 0.734 | 17452 |
| radioactivity | 0.730 | 14083 |
| polonium | 0.727 | 36755 |
| hcfc | 0.725 | 89263 |
| rbmk | 0.723 | 73850 |
| iodine-131 | 0.722 | 51608 |
| leachate | 0.721 | 84487 |
| fumarole | 0.719 | 79464 |
| mudslide | 0.716 | 71724 |
| intermediate-level | 0.715 | 62187 |
| eutrophication | 0.714 | 42648 |
| overfishing | 0.714 | 60336 |
| ozone-destroy | 0.714 | 88366 |
| malathion | 0.711 | 55530 |
| anthropogenic | 0.710 | 51620 |
| osirak | 0.710 | 97788 |