What is another word for "effluvium"?

Roget's Thesaurus (1911) lists these synonyms for "effluvium": act, acute, aeration, aerial, aerification, aeriform, aerodynamics, aerostatics, air, airy, alkali, ammonia, ammoniacal, animal, bladder, bloodhound, cloud, diffuse, elastic, emanation, emit, essence, ether, ethereal, evanesce, evaporable, evaporate, exhalation, exhale, fish, flatulence, flatulency, flatulent, flatus, fluid, foul, fragrance, fume, gas, gaseity.