Full measure is an expression that refers to the maximum or complete amount of something. There are many synonyms that can be used to describe this term. One such synonym is 'maximum capacity,' which refers to the highest amount of something that can be contained. Another synonym for full measure is 'complete amount,' which means all of something without leaving anything out. 'Total amount' is another synonym that suggests something has been counted or added up to its fullest extent. 'Entire quantity' is another term that indicates everything has been included. 'Maximal limit' is also a fitting synonym that suggests something has reached its fullest potential.