Synonyms and related words :
airy, asinine, barmy, birdbrained, birdwitted, brave, bravura, braw, bubbly, catchpenny, chichi, daring, dashing, downy, dressy, empty, ethereal, exhibitionistic, fatuous, featherbrained, feathery, flashing, flashy, flaunting, flighty, flimsy, fluffy, foam-flecked, foamy, foolish, fribble, fribbling, frilly, frivolous, futile, gallant, gay, glittering, gossamery, heady, idle, imponderous, inane, jaunty, jazzy, lathery, leger, light, light as air, lighter than vanity, mousse, nugacious, nugatory, otiose, rakish, shallow, shallow-headed, shallow-minded, shallow-pated, shallow-witted, showy, silly, slender, slight, snazzy, soapsuddy, soapsudsy, soapy, souffle, splashy, splurgy, sporty, spumose, spumous, spumy, suddy, sudsy, superficial, trifling, trite, trivial, unheavy, unprofound, vacuous, vain, vapid, volatile, weightless, windy, yeasty