Evenness

The state of being ven, level, or disturbed; smoothness; horizontal position; uniformity; impartiality; calmness; equanimity; appropriate place or level; as, evenness of surface, of a fluid at rest, of motion, of dealings, of temper, of condition.

the parity of even numbers (divisible by two)

the quality of being balanced

a quality of uniformity and lack of variation