| Similarity | Rank | |
|---|---|---|
| iodine-131 | 0.754 | 51608 |
| radioactivity | 0.743 | 14083 |
| dioxin | 0.741 | 17452 |
| groundwater | 0.741 | 12650 |
| polonium | 0.737 | 36755 |
| radionuclide | 0.736 | 25560 |
| methane | 0.732 | 11786 |
| pollutant | 0.730 | 10281 |
| cancer-causing | 0.727 | 51516 |
| ionise | 0.725 | 26893 |
| caesium | 0.723 | 37760 |
| caesium-137 | 0.716 | 59747 |
| acidification | 0.715 | 21870 |
| polonium-210 | 0.714 | 71984 |
| aquifer | 0.712 | 17613 |
| contamination | 0.710 | 7877 |
| nox | 0.707 | 28969 |
| contaminant | 0.704 | 23773 |
| strontium-90 | 0.703 | 87007 |
| anthropogenic | 0.703 | 51620 |
| beryllium | 0.700 | 52345 |
| radio-active | 0.698 | 71832 |
| particulate | 0.697 | 25930 |
| radioactive | 0.696 | 6851 |
| intermediate-level | 0.695 | 62187 |