There are a number of synonyms for the phrase "high lives," which typically refers to a glamorous or socially elite lifestyle. These might include words like "luxurious," "opulent," "lavish," "extravagant," or "sumptuous." Other possibilities might include phrases like "living the good life," "living in luxury," "enjoying the high life," "living like royalty," or "living in the lap of luxury." Essentially, any term that conveys a sense of grandeur, wealth, or social status could be considered a synonym for "high lives," as this phrase is often used to describe the most luxurious and decadent aspects of modern life.