Sometimes non-duality is described as nothing or emptiness. But this is only from the point of view of the mind. In truth, non-duality is total and utter fullness, it is not empty in the least.
It is the total cessation of suffering, it is the total extinction of multiplicity, duality and individuality.
It is beyond words but we can call it unchanging incomparable fullness-beingness-bliss or love absolute.