Synonyms:
smoothness
Meaning: a texture without roughness; smooth to the touch; "admiring the slim smoothness of her thighs"; "some artists prefer the smoothness of a board"
Usage examples
A great increase in the smoothness of running was attained when the screw was invented--a propeller which was entirely sunk in the water and therefore exercised its force, not in shocks, but in gentle constant pressure upon the fluid around it.