- smoothness - a texture without roughness; smooth to the touch
--1 is a kind of texture
Antonyms: roughness
--1 has particulars:silkiness, sleekness; slickness, slick, slipperiness, slip; fineness, powderiness; polish, gloss, glossiness, burnish - smoothness - the quality of being free from errors or interruptions
--2 is a kind of effortlessness