Effectuality is a term that refers to the degree of effectiveness or efficiency of something. There are a number of synonyms that can be used in place of this term. Some examples include efficacy, potency, performance, productivity, efficiency, capability, success, and impact. Each of these words carries a slightly different nuance and connotation, but they are all related to the concept of effectiveness or efficiency in some way. Using synonyms can help add variety and interest to your writing, as well as help to clarify your meaning by offering different perspectives on the same concept.