Roget's Thesaurus

#320. Levity

Nouns

levity; lightness etc. adj.; 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.

Verbs

be light etc. adj.; float, rise, swim, be buoyed up. render light etc. adj.; lighten, leaven.

Adjectives

light, subtile, airy; imponderous, imponderable; astatic, weightless, ethereal, sublimated; gossamery; suberose, suberous; uncompressed, volatile; buoyant, floating etc. v.; portable. light as a feather, light as a thistle, light as air; lighter than air; rise like a balloon, float like a balloon