Synonym word of imponderous:

agile, airy, atmospheric, buoyant, crumbly, dainty, delicate, downy, easy, effervescent, ethereal, featherweight, feathery, filmy, flimsy, floatable, floating, fluffy, friable, frothy, gossamery, graceful, imponderous, inconsequential, insubstantial, light-footed, ligh