Sameness, n.
1. The state of being the same, identity; abscence 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.
Syn. -- Identity; identicalness; oneness.
Shades of meaning
Fernald lists sameness only as an antonym, under difference.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given