fixed air

noun 0.679

inflammable air

noun 0.630

phlogiston

noun 0.611

liquid air

noun 0.598

fresh air

noun 0.597

oxygen gas

noun 0.577

air

noun 0.576

nitrous air

noun 0.561

oxygen

noun 0.560

phlogiston theory

noun 0.548

residual air

noun 0.545

synthetic air

noun 0.542

dioxygen

noun 0.541

light air

noun 0.540

compressed air

noun 0.538

deoxygenation

noun 0.538

firedamp

noun 0.536

hot air

noun 0.535

thin air

noun 0.533

gas and air

noun 0.525

molecular oxygen

noun 0.519

deoxidizer

noun 0.517

luft

noun 0.514

oxygen depletion

noun 0.510

air pocket

noun 0.510

change of air

noun 0.504

denitrogenation

noun 0.503

air purifier

noun 0.501