dihydrogen

noun 0.799

hydrogen ion

noun 0.798

hydrogen sulfide

noun 0.721

heavy hydrogen

noun 0.719

hydrogen halide

noun 0.713

hydrogen electrode

noun 0.712

hydrogen peroxide

noun 0.708

hydride

noun 0.702

hydrogen bromide

noun 0.702

helium

noun 0.701

hydrogen iodide

noun 0.699

hydronium

noun 0.698

hydrogen bond

noun 0.693

biohydrogen

noun 0.687

hydrogen chloride

noun 0.686

hydrogen fluoride

noun 0.685

hydrogen cyanide

noun 0.678

oxyhydrogen

noun 0.677

hydrogen burning

noun 0.672

hydrogen spectrum

noun 0.671

antihydrogen

noun 0.670

hydrogen bomb

noun 0.669

hydrogen line

noun 0.666

hydrogen economy

noun 0.661

protium

noun 0.660

standard hydrogen electrode

noun 0.656

hydro

noun 0.653

metal hydride

noun 0.653

hydrogen sulfate

noun 0.645

hydrogenosome

noun 0.645

parahydrogen

noun 0.645

hydrogenation

noun 0.643

proton

noun 0.638

hydrogen selenide

noun 0.638

hydrogen carbonate

noun 0.634

deuterium

noun 0.628

tritium

noun 0.628

oxygen

noun 0.616

hydrocarbon

noun 0.616

hydrogen sulphate

noun 0.614

oxygen gas

noun 0.612

hydrogen sulfite

noun 0.611

peroxide

noun 0.608

hydroxide

noun 0.602

hydrogenolysis

noun 0.601

halogen

noun 0.601

hydroxyl

noun 0.600

water vapor

noun 0.597

water

noun 0.596

hydrazine

noun 0.593

gas

noun 0.591

nitrogen

noun 0.591

hydrosulfide

noun 0.589

liquid helium

noun 0.589

histamine

noun 0.587

hypo

noun 0.584

water gas

noun 0.581

phosphine

noun 0.580

lithium hydride

noun 0.579

hafnium

noun 0.579

ideal gas

noun 0.578

heme

noun 0.576

hyphen

noun 0.576

heliox

noun 0.574

odium

noun 0.572

ethylene

noun 0.572

titanium hydride

noun 0.572

atom

noun 0.571

fuel cell

noun 0.571

natural gas

noun 0.570

xenon

noun 0.568

atomic

noun 0.568

hemoglobin

noun 0.568

noble gas

noun 0.567

aluminium hydride

noun 0.567

deuteride

noun 0.565

hydrochloric acid

noun 0.564

electron

noun 0.563

methane

noun 0.560

gas hydrate

noun 0.560

oxonium

noun 0.559

hydriodic acid

noun 0.559

hadron

noun 0.556

sodium

noun 0.556

carbon

noun 0.552

gasoline

noun 0.552

hydra

noun 0.552

hydration

noun 0.552

borohydride

noun 0.551

carbon dioxide

noun 0.551

hexaboride

noun 0.551

propane

noun 0.550

fluorine

noun 0.550

hexane

noun 0.549

bicarbonate

noun 0.548

hyp

noun 0.548

heavy water

noun 0.548

sulfur

noun 0.548

aluminium

noun 0.547

acetylene

noun 0.546