| Similarity | Rank | |
|---|---|---|
| thermonuclear | 0.814 | 25747 |
| fissile | 0.801 | 61461 |
| oklo | 0.791 | 92756 |
| tritium | 0.777 | 26341 |
| tokamak | 0.769 | 33006 |
| isomerisation | 0.769 | 83786 |
| helium-3 | 0.768 | 45115 |
| ruthenium | 0.765 | 96719 |
| lepton | 0.762 | 71393 |
| gas-phase | 0.758 | 66348 |
| thermo-nuclear | 0.757 | 84808 |
| antineutrino | 0.755 | 84707 |
| ionize | 0.755 | 32044 |
| caesium-137 | 0.753 | 59747 |
| helium-4 | 0.752 | 72090 |
| polonium | 0.748 | 36755 |
| weapons-grade | 0.748 | 50220 |
| electromagnetism | 0.747 | 39860 |
| rbmk | 0.747 | 73850 |
| catalyse | 0.746 | 20584 |
| subatomic | 0.745 | 49881 |
| catalysis | 0.745 | 38415 |
| deuteron | 0.742 | 41033 |
| energetics | 0.740 | 49300 |
| fast-breeder | 0.739 | 53738 |