SimilarityRank
hydrogen 0.732 10438
oxygen 0.628 6930
proton 0.622 20444
neutron 0.615 24797
Hydrogen 0.606 61006
hydrogen_atom 0.603 96670
methane 0.596 14641
liquid_water 0.592 98009
electron 0.589 9389
O_2 0.589 92339
carbon_dioxide 0.585 11994
gas 0.582 1663
water_vapor 0.580 40856
isotope 0.574 40195
water_vapour 0.562 85308
propellant 0.559 84378
cosmic_ray 0.555 60042
our_atmosphere 0.550 72416
water_molecule 0.550 62720
tritium 0.547 90971
nitrogen 0.543 11773
ion 0.537 12236
Co_2 0.537 19859
neutrino 0.537 41916
the_solar_wind 0.536 80824