Noah Webster's Dictionary (n.) The act of equalizing, or state of being equalized.

Multi-Version Concordance Equalization (1 Occurrence) 2 Corinthians 8:14 but that, by equalization of burdens, your superfluity having in the present emergency supplied their deficiency, their superfluity may in turn be a supply for your deficiency later on, so that there may be equalization of burdens. (WEY)