Sentimental fool is a term used to describe an individual who is overly emotional and prone to getting carried away by their feelings. However, there are several other synonyms that can be used to describe such a person. These include "softie," "sap," "mawkish," and "weepy." Other expressions that could apply include "hopeless romantic," "emotional wreck," and "romantic idealist." While each of these terms can convey the same idea as sentimental fool, they each have slightly different connotations. For instance, hopeless romantic may imply a greater degree of optimism, while the word "mawkish" might suggest thoughtlessness as well. Regardless of the term used, however, such an individual could be prone to making impulsive decisions driven by their emotions and should take care to weigh their decisions carefully.