| Similarity | Rank | |
|---|---|---|
| strontium | 0.881 | 49539 |
| strontium-90 | 0.877 | 87007 |
| caesium-137 | 0.874 | 59747 |
| beryllium | 0.872 | 52345 |
| bromine | 0.855 | 45010 |
| radionuclide | 0.853 | 25560 |
| trioxide | 0.847 | 83599 |
| fluorine | 0.845 | 51745 |
| neodymium | 0.835 | 76300 |
| ruthenium | 0.833 | 96719 |
| polonium | 0.832 | 36755 |
| ferric | 0.827 | 42961 |
| ammonium | 0.824 | 22976 |
| thorium | 0.823 | 60984 |
| non-radioactive | 0.823 | 79442 |
| zirconium | 0.822 | 82220 |
| molybdenum | 0.820 | 51774 |
| iodine-131 | 0.820 | 51608 |
| non-polar | 0.819 | 53460 |
| polonium-210 | 0.819 | 71984 |
| polycyclic | 0.818 | 68633 |
| oxidize | 0.817 | 38122 |
| carbon-14 | 0.816 | 58995 |
| lindane | 0.815 | 67136 |
| unreactive | 0.815 | 78898 |