evenness
nounUK /ˈiːvənnəs/
US /ˈiːvərnnəs/
Evenness means being flat and smooth, with no bumps or holes.
The evenness of the table made it easy to write on.
OTHER MEANINGS
2. The quality of being equal or fair to everyone.
The evenness of the rules made all the players happy.
3. The quality of staying calm and not getting too upset or excited.
Her evenness of temper helped her handle the noisy class.
4. The quality of being the same in amount or size throughout.
The evenness of the paint made the wall look perfect.