Premial is a word often used in legal and insurance contexts to refer to a reward or bonus for superior performance. There are several synonyms for premial that can be used interchangeably depending on the context. One similar term is "bonus", which implies an additional amount of money or benefit given as a reward for exceptional achievement. Alternatives include "incentive", which denotes a stimulus or encouragement to motivate individuals towards a desired outcome, and "prize", which refers to an award or accolade given in recognition of outstanding work. These synonyms can be effectively employed to convey the idea of a reward or benefit being offered for exceptional performance.