evener

adj

1. (comparative, form-of)comparative form of even: more even

   “I prefer the white pine, because it is less liable to gutter with the rain, and makes an evener roof.”

noun

1. One who, or that which, makes even.

   “Hers is not simply a plea for the value of tragedy, for that awareness of death which increases incentives for life; it is rather a negative use of death as the great leveler, the evener of scores.”

2. (dated)In vehicles, a swinging crossbar, to the ends of which other crossbars, or whiffletrees, are hung, to equalize the draught when two or three horses are used abreast.
3. A raddle (instrument used by weavers).