Webster's Revised Unabridged Dictionary · 1913

Sameness

Sameness , noun

1.
The state of being the same; identity; absence of difference; near resemblance; correspondence; similarity; as, a sameness of person, of manner, of sound, of appearance, and the like.
A sameness of the terms. — Bp. Horsley
2.
Hence, want of variety; tedious monotony.