airiness, animation, ascent, brainlessness, bubbliness, buoyancy, caducity, changeability, changeableness, coquettishness, corruptibility, daintiness, death, delicacy, downiness, empty-headedness, ephemerality, ephemeralness, ethereality, evanescence, evaporability, faddishness, faddism, fickleness, finitude, fleetingness, flightiness, flippancy, floatability, fluffiness, foaminess, foolishness, frivolity, frivolousness, frothiness, fugacity, gentleness, giddiness, gossameriness, impermanence, impermanency, inconstancy, instability, lack of depth, lack of weight, levitation, levity, lightness, mercuriality, mercurialness, momentariness, mortality, mutability, perishability, shallow-wittedness, shallowness, skittishness, softness, sprightliness, superficiality, tenderness, thinness, thoughtlessness, transience, transiency, transientness, transitoriness, undependability, unheaviness, unpredictability, unprofoundness, unprofundity, unreliability, vaporability, vaporizability, variability, weightlessness, witlessness, yeastiness
levity, lightness, imponderability, buoyancy, volatility
, feather, dust, mote, down, thistle, down, flue, cobweb, gossamer, straw, cork, bubble, balloon, float, buoy, ether, air, leaven, ferment, barm, yeast, lighter-than-air balloon, helium balloon, hydrogen balloon, hot air balloon, convection, thermal draft, thermal, light, subtile, airy, imponderous, imponderable, astatic, weightless, ethereal, sublimated, gossamery, suberose, suberous, uncompressed, volatile, buoyant, floating, portable, light as a feather, light as a thistle, light as air, lighter than air, rise like a balloon, float like a balloon.
gaseity, vaporousness, flatulence, flatulency, volatility
, aeration, aerification, elastic fluid, gas, air, vapor, ether, steam, essence, fume, reek, effluvium, flatus, cloud, ammonia, ammoniacal gas, volatile alkali, vacuum, partial vacuum, pneumatics, pneumatostatics, aerostatics, aerodynamics, gasmeter, gasometer, air bladder, swimming bladder, sound, (of a fish), gaseous, aeriform, ethereal, aerial, airy, vaporous, volatile, evaporable, flatulent.
vaporization, volatilization, gasification, evaporation, vaporation, distillation, cupellation, cohobation, sublimination, exhalation, volatility
, vaporizer, still, retort, fumigation, steaming, bay salt, chloride of sodium, mister, spray, bubble, effervescence, ', volatilized, reeking, volatile, evaporable, vaporizable, bubbly, effervescent, boiling, Specific Fluids.