oneness

noun

1. the quality of being one; singleness.
2. uniqueness.
3. sameness; identity.
4. unity of thought, feeling, belief, aim, etc.; agreement; concord.
5. a strong feeling of closeness or affinity; union: He feels a oneness with God.

noun

1. the state or quality of being one; singleness
2. the state of being united; agreement
3. uniqueness
4. sameness

n.1590s, from one + -ness. A re-formation of Middle English onnesse, which vanished by 13c.