roughness

The property of being rough, coarseness.

The roughness of the road made me wonder if my car would fall apart.

Something that is rough; a rough spot.

A variety of suitable methods for surface inspection are available to detect topographical defects induced by surface roughnesses such as scratches, digs, inclusions and spatters.

Roughage; coarse fodder.

With this latter implement, the corn stalk fodder, shucks, oats, hay and other "roughness" may be finely cut up[…]

Abundance, especially of food.

A measure of how rough something is, such as a surface

The surface roughness was low.