| Similarity | Rank | |
|---|---|---|
| pollutant | 0.755 | 10281 |
| photochemical | 0.718 | 30345 |
| pollution | 0.715 | 2289 |
| emission | 0.698 | 3620 |
| sulphur | 0.695 | 6647 |
| sulphurous | 0.682 | 30179 |
| ozone | 0.678 | 5037 |
| nox | 0.672 | 28969 |
| stratosphere | 0.670 | 17932 |
| alloprene | 0.670 | 83778 |
| seveso | 0.668 | 45819 |
| atmospheric | 0.662 | 7829 |
| flooding | 0.659 | 10043 |
| dioxide | 0.658 | 4762 |
| monoxide | 0.655 | 12904 |
| fallout | 0.647 | 25718 |
| recycler | 0.640 | 57887 |
| halon | 0.639 | 27495 |
| vocs | 0.637 | 67555 |
| defoliation | 0.636 | 62141 |
| sub-zero | 0.636 | 50007 |
| inhalation | 0.636 | 23727 |
| nitrous | 0.633 | 29606 |
| thunderstorm | 0.630 | 21293 |
| fog | 0.629 | 6281 |