Multimillionaire is a term used to describe someone who has a net worth of several million dollars. However, there are several other synonyms that can be used to describe a person of immense wealth such as billionaire, tycoon, magnate, rich person, affluent individual, and wealthy individual. These terms are often used interchangeably to describe someone who has a significant amount of wealth. Additionally, some other words that can be used to describe rich people include prosperous, thriving, successful, well-off, and opulent. Regardless of the specific word used, it is clear that these individuals are in the upper echelons of wealth and financial success.