Smoothness

Quality or state of being smooth.

powerful and effective language; "his eloquence attracted a large congregation"; "fluency in spoken and written English is essential"; "his oily smoothness concealed his guilt from the police"

the quality of being free from errors or interruptions; "the five-speed manual gearbox is smoothness personified"

the quality of having a level and even surface; "the water was a glassy smoothness"; "the weather system of the Pacific is determined by the uninterrupted smoothness of the ocean"