Cartes blanche is a French expression that means "blank cards" and is used to indicate complete freedom or authority. Several synonyms can be used for this phrase, depending on the context in which it is used. Some synonyms include unrestricted power, unlimited authority, and unbridled control. Other options can include total discretion, complete autonomy, and full empowerment. These phrases convey the same idea that an individual or entity has the ability to take complete control or make decisions without any restrictions or limitations. When a person or group has carte blanche, they have the freedom to take whatever course of action they see fit.