smoothness

noun

1.
a texture without roughness; smooth to the touch
Antonym:
roughness
Derived from:
smooth
2.
3.
the quality of being bland and gracious or ingratiating in manner
Derived from:
smooth
4.
the quality of having a level and even surface
Derived from:
smooth
5.
the quality of being free from errors or interruptions
Derived from:
smooth