The phrase "most denominating" generally refers to the characteristic of an entity that holds the most influence or control over a particular situation or context. Some synonyms for this phrase might include "dominant," "prevailing," "overruling," "paramount," or "decisive." Other related words that could be used in place of "most denominating" might include "authoritative," "commanding," "ascendant," "supreme," or "influential." These synonyms all convey a similar sense of power or supremacy, and could be used interchangeably depending on the context in which they are being used.