There are many alternative words that can be used to describe prosperous people. Some of the most common synonyms include affluent, wealthy, rich, thriving, successful, thriving, booming, and flourishing. Each of these words can be used to describe people who are financially secure, living comfortably, and enjoying the benefits of their prosperity. Some additional synonyms for prosperous people might include prosperous individuals, well-to-do citizens, or financially successful individuals. Whatever word you choose to describe prosperous people, it's clear that these individuals have worked hard to achieve their success and are now enjoying the fruits of their labor.