Adjective : feathery clouds.    From Dictionary.com. 

The featheriness of the maple, and the arrowy straightness and pyramidal form of the cryptomeria, please me better than all else; but why criticise?.    From Wordnik.com.  [Unbeaten Tracks in Japan] Reference

We had left Chop Yat early in the morning after a night of excessive heat in beds of excessive featheriness and were walking towards Helmsley by way of Rievaulx, all unconcerned as to lunch by the way, because the ordnance map marked with such cordial legibility an inn on the road at a reasonable distance.    From Wordnik.com.  [Punch, or the London Charivari, Volume 152, April 4, 1917] Reference

Almost as pleasing was the Carnitas, with the slow-roasted pork shredded to a near-Machaca featheriness and refreshingly essenced with a healthy amount of citrus.    From Wordnik.com.  [Tucson Citizen] Reference

"The whole of the Mosel has a style of lightness and intensity which suits the riesling grape incredibly well … it can come in at 8% alcohol but always has a wonderfully fresh flavour and a featheriness and delicacy that doesn't go to your head.    From Wordnik.com.  [The Guardian World News] Reference

For mine floats like a swan in featheriness.    From Wordnik.com.  [Poems by a Little Girl] Reference