The term 'most over-sentimental' has a number of synonyms that can be used to describe the same feeling. These words can vary in intensity, but they all refer to an exaggerated display of emotion. Some synonyms for most over-sentimental include melodramatic, saccharine, mawkish, sappy, maudlin, and corny. Each of these words has its own connotation and can be used in different contexts depending on the situation. When trying to describe a piece of writing or a movie that is overly emotional, any of these words could be used to describe it accurately.