There are not many synonyms for "Carl XVI Gustav" since it is a proper name of the current King of Sweden. However, some alternative ways to refer to him could be "King Carl Gustaf" or simply "The monarch of Sweden." These substitutions may be helpful for those who are unfamiliar with the formalities or are not comfortable using such a long name in their writing. Regardless of the terminology, King Carl XVI Gustav has reigned over Sweden since 1973 and is a beloved figure to his people. His impact on the country's cultural and political landscape will continue to be felt for years to come.