Charge d'affaires ad interim is a term often used in diplomacy to denote an official who is appointed to represent a country temporarily in the absence of a regular ambassador. Some synonyms that could be used instead of this term are interim ambassador, acting ambassador, provisional ambassador, temporary envoy, acting envoy, provisional envoy, and temporary representative. These terms indicate a temporary diplomatic assignment and underscore the fact that the holder of the position is appointed to carry out specific duties without necessarily being a permanent representative of their country. Other related phrases include charge d'affaires, plenipotentiary, and ambassador-at-large.