Noninferiority is a term used in medical research to describe a situation where a new treatment is not worse than an existing treatment. However, the term "noninferiority" can be confusing to some people. Therefore, there are synonyms that can be used to express the same concept. These synonyms include "equivalence", "comparability", "similarity", and "efficacy not less than". These words are used to indicate that there is no significant difference between two treatments in terms of safety and effectiveness. Using synonyms for noninferiority is a great way to communicate research results to patients and healthcare providers in a clear and understandable way.