Sham sympathy is a term used to describe insincere or fake expressions of compassion. There are several synonyms that can be used to describe such behavior. One such synonym is "crocodile tears" which refers to shedding tears out of insincere sympathy. Another synonym is "mawkishness" which means an excessively sentimental or emotional display that is not genuine. The term "phony empathy" can also be used to describe behavior that is meant to seem compassionate but is actually insincere. Overall, using these synonyms can help to accurately describe behavior that lacks true empathy and is instead used as a form of manipulation or deception.