What is another word for "vaporousness"?

Roget's Thesaurus (1911) lists these synonyms for "vaporousness": aeration, aerial, aerification, aeriform, aerodynamics, aerostatics, air, airy, alkali, ammonia, ammoniacal, bladder, cloud, diffuse, effluvium, elastic, emit, essence, ether, ethereal, evanesce, evaporable, evaporate, fish, flatulence, flatulency, flatulent, flatus, fluid, fume, gas, gaseity, gaseous, gasify, gasometer, partial, pneumatics, reek, sound, steam.