Powdery is a synonym of powderlike.
As adjectives the difference between powdery and powderlike
is that powdery
is of or pertaining to powder while powderlike
is resembling powder.
Of or pertaining to powder.
*1872 , , Roughing It ,
*:We were plowing through great deeps of powdery alkali dust that rose in thick clouds and floated across the plain like smoke from a burning house. We were coated with it like millers; so were the coach, the mules, the mail-bags, the driver—we and the sage-brush and the other scenery were all one monotonous color.