Sure bet is a term that is commonly used to describe a certain thing or situation that is believed to have a high degree of certainty in outcome. This phrase is often associated with sports betting and gambling, but it can also be used in various contexts that involve risk and uncertainty. Some of the synonyms for sure bet include a sure thing, a safe bet, a dead cert, a cinch, a banker, a lock, and a shoo-in. These terms are often used interchangeably, but they all convey the same message of confidence and assurance that a particular outcome is highly likely to occur.