Chancres are a type of sore that develops on the skin or mucous membranes as a result of a bacterial infection. While chancres are most commonly associated with sexually transmitted infections such as syphilis, they can also be caused by other types of bacteria, such as those that cause tuberculosis or leprosy. Some synonyms for the word chancres include ulcers, sores, lesions, and pustules, depending on the specific characteristics of the sore. Regardless of the terminology used, it is essential to seek proper medical treatment for any type of sore or lesion to prevent further complications.