| Similarity | Rank | |
|---|---|---|
| strontium-90 | 0.933 | 87007 |
| strontium | 0.885 | 49539 |
| iodine-131 | 0.877 | 51608 |
| polonium-210 | 0.877 | 71984 |
| caesium | 0.874 | 37760 |
| radionuclide | 0.861 | 25560 |
| naturally-occurring | 0.851 | 73009 |
| longer-lived | 0.849 | 77972 |
| organochlorine | 0.849 | 48475 |
| ruthenium | 0.845 | 96719 |
| heparan | 0.844 | 85580 |
| methanogenesis | 0.839 | 54198 |
| cancer-causing | 0.839 | 51516 |
| organophosphate | 0.838 | 84664 |
| mtbe | 0.837 | 87435 |
| thorium | 0.836 | 60984 |
| carbon-14 | 0.834 | 58995 |
| biphenyl | 0.834 | 49287 |
| adsorbent | 0.833 | 52226 |
| polonium | 0.832 | 36755 |
| methanogenic | 0.831 | 36166 |
| lindane | 0.831 | 67136 |
| molybdenum | 0.830 | 51774 |
| colloid | 0.830 | 46508 |
| beryllium | 0.828 | 52345 |