When it comes to synonyms for the phrase "summer palace," there are a few options that come to mind. One such synonym could be "vacation home," as the term suggests a place where one retreats to during a specific time of year. Another potential synonym could be "cottage," which typically implies a smaller, more rustic dwelling that is often associated with summer getaways. A third option could be "villa," which suggests a larger and more opulent residence that may be located in a hot and sunny climate. Other possible synonyms for "summer palace" might include "beach house," "lake house," or "mountain retreat." Ultimately, the choice of synonym depends on the specific context in which the phrase is being used.