Polyphagia refers to an excessive or insatiable appetite, which is often a symptom of various medical conditions such as diabetes, hyperthyroidism, or certain neurological disorders. There are several synonyms that can be used to describe polyphagia, including hyperphagia, gluttony, voracity, and overeating. In addition, polydipsia, which refers to excessive thirst, and polyuria, which is excessive urination, are two other terms that are often associated with polyphagia. While polyphagia can be a sign of a serious underlying health issue, it can also be a result of emotional or psychological factors such as anxiety or stress. It is always important to talk to a healthcare professional if you are experiencing any symptoms of polyphagia.