Similar word to featherweight:

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