An incentive scheme is a program designed to encourage individuals or groups to achieve desired outcomes. There are several synonyms that can be used to describe an incentive scheme. One is a rewards program, which emphasizes the positive outcomes that participants can receive. Another is a performance-based system, which focuses on linking rewards to particular levels of success. A third synonym is a profit-sharing plan, which emphasizes the potential financial benefits that can be gained by achieving specific goals. Ultimately, the right synonym for an incentive scheme will depend on the specifics of the program and the goals it is intended to achieve.