What's the noun for gaseousness? Here's the word you're looking for.
gas
(chemistry)Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (or in a bubble of liquid) (or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.
(chemistry) A chemical element or compound in such a state.
(uncountable) A flammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles.
(countable) A hob on a gas cooker.
(US) Methane or other waste gases trapped in one's belly as a result of the digestive process.
(slang) A humorous or entertaining event or person.
(slang) Something highly entertaining or remarkable.
A kind of hot rod based on production models from the 1930s to mid-1960s, stripped of extraneous weight and jacked up using a truck beam axle to provide better weight distribution on acceleration.
More generally, any car or truck that runs on pump gas, as opposed to diesel fuel, racing fuel, or a car with an electric motor.