monoxide

noun 0.838

carbon oxide

noun 0.803

carbon dioxide

noun 0.742

carboxyhemoglobin

noun 0.722

nitrogen monoxide

noun 0.705

carbon

noun 0.639

nitrogen oxide

noun 0.610

phosgene

noun 0.599

cyanide

noun 0.598

carbonyl

noun 0.597

carbo

noun 0.594

sulfur dioxide

noun 0.593

carbonic acid gas

noun 0.591

greenhouse gas

noun 0.582

dioxide

noun 0.581

metal carbonyl

noun 0.580

carboxyl

noun 0.575

black carbon

noun 0.574

oxygen gas

noun 0.574

activated carbon

noun 0.572

nitrous oxide

noun 0.571

carboxylic acid

noun 0.570

cobalt

noun 0.565

charcoal

noun 0.565

coal gas

noun 0.564

radiocarbon

noun 0.564

coal

noun 0.563

carbon disulfide

noun 0.560

nitric oxide

noun 0.559

methanol

noun 0.558

ketone

noun 0.558

hypercapnia

noun 0.557

molecular oxygen

noun 0.553

carbonic acid

noun 0.553

carcinogen

noun 0.553

methane

noun 0.552

nitrogen dioxide

noun 0.551

hydrogen cyanide

noun 0.548

inorganic carbon

noun 0.547

carboxaldehyde

noun 0.547

chlorofluorocarbon

noun 0.546

hydrogen sulfide

noun 0.546

radon

noun 0.545

dicarbonyl

noun 0.545

air pollution

noun 0.545

sulfur oxide

noun 0.544

formaldehyde

noun 0.544

organic compound

noun 0.544

motor car

noun 0.543

carbon black

noun 0.543

oxygen

noun 0.542

oxidase

noun 0.542

air pollutant

noun 0.539

coal black

noun 0.539

chronic obstructive pulmonary disease

noun 0.537

carbon-14

noun 0.536

iron carbide

noun 0.536

carbon credit

noun 0.535

carbamic acid

noun 0.534

monocyte

noun 0.534

oxyhaemoglobin

noun 0.533

hemoglobin

noun 0.533

coal oil

noun 0.532

malonaldehyde

noun 0.531

carbon tetrachloride

noun 0.530

potassium cyanide

noun 0.530

carburetor

noun 0.530

coa

noun 0.530

monoamine oxidase

noun 0.529

charbon

noun 0.529

carb

noun 0.528

cob

noun 0.527

poison

noun 0.527

capnometer

noun 0.526

ethyl carbamate

noun 0.526

carbolic acid

noun 0.526

motorcar

noun 0.526

carbon dating

noun 0.526

crotonaldehyde

noun 0.526

myoglobin

noun 0.525

monocarboxylate

noun 0.525

carbon footprint

noun 0.525

cupric oxide

noun 0.525

chemical weapon

noun 0.525

asphyxiation

noun 0.524

smog

noun 0.523

oxide

noun 0.523

chemical compound

noun 0.523

carbene

noun 0.522

propane

noun 0.521

cyclopropane

noun 0.521

halocarbon

noun 0.520

carbonate

noun 0.518

toxin

noun 0.518

hydrocyanic acid

noun 0.518

chemical substance

noun 0.518

gas chromatography

noun 0.518

cocaine

noun 0.517

acetone

noun 0.517

coking coal

noun 0.517