The phrase "well off" is used to describe someone who is financially comfortable or prosperous. There are several synonyms for this phrase, such as affluent, wealthy, rich, prosperous, successful, and thriving, among others. These words convey a sense of financial security and stability, and can be used in different contexts to describe various degrees of wealth. While some may use these terms interchangeably, each word carries a slightly different connotation that reflects the speaker's intent. For instance, while "affluent" implies a high level of income, "prosperous" suggests financial success through hard work or investment. Regardless of the word chosen, the meaning remains the same: a person who is "well off" is someone who has attained a certain level of financial success and security.