What is another word for "volatility"?

Roget's Thesaurus (1911) lists these synonyms for "volatility": aeration, aerial, aerification, aeriform, aerodynamics, aerostatics, air, airy, alkali, ammonia, ammoniacal, astatic, balloon, barm, bay, bladder, boil, boiling, bubble, bubbly, buoy, buoyancy, buoyant, chloride, cloud, cobweb, cohobate, cohobation, convection, cork, cupellation, diffuse, distill, distillation, down, draft, dust, effervesce, effervescence, effervescent.