When it comes to describing someone who is incredibly wealthy, there are plenty of synonyms to consider. Instead of using the term "frightfully rich," you might opt for phrases like "stinking rich," "filthy rich," or even "loaded." Alternatively, you could use adjectives like "opulent," "affluent," "lavish," or "prosperous" to describe their financial status. If you're looking for a more formal or scholarly term, you could use "plutocratic," "oligarchic," or "aristocratic," to emphasize their elite status. Whatever terms you choose, keep in mind that the language we use to describe wealth can shape our perceptions of the people who possess it.