The term 'Couldn't Agree More' is a phrase used to express strong agreement with something. The two crossword solutions for this phrase are 'AMEN' and 'YEAH'. 'AMEN' is a Hebrew word that is commonly used in religious contexts to signify agreement or acceptance. 'YEAH' is an informal expression of agreement or understanding. Both words are used to express agreement with something, but 'AMEN' is more formal while 'YEAH' is more casual.