the quality of being one; singleness.

uniqueness.

sameness; identity.

unity of thought, feeling, belief, aim, etc.; agreement; concord.

a strong feeling of closeness or affinity; union

He feels a oneness with God.

noun

singleness , singularity , entirety , integrity , totality , wholeness , identicalness , identity , selfsameness , solidarity , union , accord , concord , harmony , individuality , indivisibility , sameness , unanimity , uniformity , unity