helium burning

noun 0.790

carbon burning

noun 0.698

hydrogen

noun 0.672

helium fusion

noun 0.664

hydrogen line

noun 0.642

hydrogen spectrum

noun 0.626

oxyhydrogen

noun 0.625

hydrogen economy

noun 0.611

biohydrogen

noun 0.611

hydrogenation

noun 0.607

hydrogenolysis

noun 0.602

hydrogen bomb

noun 0.601

helium flash

noun 0.598

hydrogen ion

noun 0.590

hydrogen electrode

noun 0.576

hydrogen bond

noun 0.575

heavy hydrogen

noun 0.575

burning

noun 0.573

dihydrogen

noun 0.571

hydrogen halide

noun 0.568

nuclear fusion

noun 0.568

hydrogen cyanide

noun 0.566

hydrogenosome

noun 0.566

hydrogen bromide

noun 0.565

hydrogen iodide

noun 0.557

standard hydrogen electrode

noun 0.555

hydrogen sulfide

noun 0.554

hydrogen peroxide

noun 0.551

combustion

noun 0.549

hydrogen fluoride

noun 0.546

dehydrogenation

noun 0.540

hydride

noun 0.529

hydrodeoxygenation

noun 0.526

hydronium

noun 0.523

hydrogen selenide

noun 0.523

transhydrogenase

noun 0.522

parahydrogen

noun 0.520

metal hydride

noun 0.518

protium

noun 0.517

fusion reactor

noun 0.514

hydrogen chloride

noun 0.513

pilot burner

noun 0.507

hybrid rocket

noun 0.505

antihydrogen

noun 0.504

hydrogen sulfate

noun 0.502