Bazillionaire is a slang term used to describe someone who is incredibly wealthy. However, there are many synonyms for this term that can be used in more formal or professional settings. Some alternatives include billionaire, tycoon, magnate, mogul, plutocrat, and captain of industry. Each of these words carries a slightly different connotation, with billionaire being the most widely recognized and neutral term. Tycoon emphasizes the person's success in business or industry, while magnate suggests wealth and power in a particular field. Mogul and plutocrat both imply a high level of control and influence, and captain of industry suggests a pioneering leader in their field. Regardless of the term used, all of these words convey wealth and success.