Excessive sentiment can be described using a variety of synonyms to convey its meaning. One such word is "overemotional," which denotes someone who is excessively emotional or sentimental. Another synonym is "maudlin," which refers to someone who is excessively sentimental to the point of being overly sentimental. "Sappiness" is another term that can be used to describe excessive sentimentality in a negative way. "Schmaltz" is another synonym that describes an overly sentimental style or sentimentality that is considered to be excessively cheesy or sentimental. There are many words that can be used to describe excessive sentiment but these few capture the essence of the word.