The phrase "well to do" is commonly used to describe someone who is financially affluent or prosperous. However, there are many other synonyms that can be used to describe a person's financial status. Some of these include "wealthy," "rich," "affluent," "prosperous," "privileged," "loaded," "moneyed," and "well-heeled." These synonyms often have different connotations and shades of meaning. For example, "wealthy" tends to imply a large amount of money and resources, while "affluent" carries connotations of social status and lifestyle. Choosing the right synonym can help to convey precise meaning and nuance in your writing or speech.