oneness
[noun]
Synonyms: unity, individuality, singleness, singularity, singularness, uniqueness, unicity, uniquity, entirety, allness, completeness, entireness, totality, wholeness, identity, identicalness, sameness, selfsameness

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Antonyms: multiplicity

[TahlilGaran] English Synonym Dictionary ▲

one‧ness /ˈwʌnnəs, ˈwʌnnɪs/ noun [uncountable]
a peaceful feeling of being part of a whole
oneness with
a sense of oneness with nature

[TahlilGaran] Dictionary of Contemporary English ▲