There are several synonyms for the word "more over-sentimental" that one can use to convey the same meaning. Some of these words include "mawkish," "schmaltzy," "sappy," "corny," "gooey," and "maudlin." These words describe a state of excessive or exaggerated sentimentality that is often considered excessive or cloying. While sentimentality can be appropriate in certain situations, such as in romantic relationships or during emotional moments, it can also be seen as a weakness or a lack of emotional maturity when taken too far. Therefore, it is important to use these synonyms carefully in order to avoid sounding overly emotional or sentimental in a negative way.