Supererogative is a word that describes actions or behaviors that go above and beyond what is expected or required. This rare word has few synonyms, but here are a few options: 1. Excessive: Beyond what is necessary, extreme. 2. Surplus: More than what is needed or expected. 3. Redundant: Unnecessary or superfluous. 4. Superfluous: Extra or unnecessary beyond what is needed. 5. Gratuitous: Given without any obligation or duty. These words convey a similar sense of excess or going beyond what is required, but each has a slightly different connotation. Whether you are writing a paper or trying to impress someone with your vocabulary, these words may come in handy when discussing the concept of supererogative.