nitrous

noun 0.876

nitrous air

noun 0.832

nitric oxide

noun 0.782

laughing gas

noun 0.776

nitrogen oxide

noun 0.760

nitrogen monoxide

noun 0.742

dinitrogen tetroxide

noun 0.727

nitrogen tetroxide

noun 0.720

nitroso

noun 0.713

nitrous acid

noun 0.712

nitro

noun 0.708

nitrogen dioxide

noun 0.696

nitrox

noun 0.694

dinitrogen pentoxide

noun 0.685

nitrogen

noun 0.682

nitric

noun 0.651

nitric acid

noun 0.650

oxygen gas

noun 0.648

nitrate

noun 0.645

dinitrogen

noun 0.642

liquid nitrogen

noun 0.639

nitrite

noun 0.635

nitromethane

noun 0.632

nitrosamine

noun 0.619

potassium nitrate

noun 0.617

sodium nitrite

noun 0.616

carbon dioxide

noun 0.613

nitrogen narcosis

noun 0.612

nitroglycerine

noun 0.610

potassium nitrite

noun 0.608

oxygen

noun 0.601

nitrocellulose

noun 0.600

peroxynitrite

noun 0.592

sodium nitrate

noun 0.592

naloxone

noun 0.591

amyl nitrite

noun 0.589

nitrate of soda

noun 0.588

natural gas

noun 0.587

nitrone

noun 0.587

carbon oxide

noun 0.587

amyl nitrate

noun 0.587

nitrobenzene

noun 0.586

nitrosonium

noun 0.585

nitride

noun 0.584

gas and air

noun 0.583

nitrosothiol

noun 0.582

nitropropane

noun 0.581

nitroguanidine

noun 0.576

ozone

noun 0.574

dioxide

noun 0.572

carbon monoxide

noun 0.571

greenhouse gas

noun 0.564

sulfur hexafluoride

noun 0.564

nitrosodimethylamine

noun 0.564

nitre

noun 0.563

nitroaromatic

noun 0.562

liquid air

noun 0.561

nitrile

noun 0.558

dioxygen

noun 0.557

noble gas

noun 0.557

inert gas

noun 0.557

oxynitride

noun 0.557

oxide

noun 0.556

nitrosoguanidine

noun 0.555

nitrosylation

noun 0.554

nitrogen trichloride

noun 0.550

nitration

noun 0.550

inhalant

noun 0.548

gas

noun 0.548

protoxide

noun 0.548

nitrobenzoic acid

noun 0.547

sulfur dioxide

noun 0.545

gas hydrate

noun 0.545

xenon

noun 0.544

nox

noun 0.541

trinitrate

noun 0.541

oxygen therapy

noun 0.541

denitrification

noun 0.539

nitroblue tetrazolium

noun 0.538

nitrofuran

noun 0.537

carbonic acid gas

noun 0.537

oxyfuel

noun 0.536

superoxide

noun 0.536

hydrogen peroxide

noun 0.536

nitrene

noun 0.535

sulfur oxide

noun 0.535

nitroaniline

noun 0.535

oxygen bottle

noun 0.533

nicotine

noun 0.531

oxygen cylinder

noun 0.531

oxycodone

noun 0.530

nitrofurantoin

noun 0.530

narcotic

noun 0.530

compressed air

noun 0.529

chlorine dioxide

noun 0.528

nitroanilide

noun 0.528

oil gas

noun 0.528

anesthetic

noun 0.527

molecular oxygen

noun 0.526

nitrobenzyl

noun 0.526