roughness

noun

1. (countable, uncountable)The property of being rough, coarseness.

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

2. (countable, uncountable)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.”

3. (US, countable, uncountable)Roughage; coarse fodder.

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

4. (Scotland, countable, uncountable)Abundance, especially of food.
5. (countable)A measure of how rough something is, such as a surface

   “The surface roughness was low.”