airy, barmy, bubbly, downy, ethereal, feathery, fluffy, foam-flecked, frothy, gossamery, heady, imponderous, lathery, leger, light, light as air, lighter than vanity, mousse, soapsuddy, soapsudsy, soapy, souffle, spumose, spumous, spumy, suddy, sudsy, unheavy, volatile, weightless, yeasty