Chancrous is a term used to describe something that is diseased or damaged. There are several synonyms for the word chancrous including ulcerous, cancerous, gangrenous, necrotic, putrid, rotten, and decaying. These words describe conditions that are harmful, dangerous, or even life-threatening. Ulcerous and cancerous both refer to conditions that involve the growth of abnormal cells in or on the body. Gangrenous and necrotic describe tissue death or decay. Putrid, rotten, and decaying all describe substances or materials that have decomposed or become spoiled. Using synonyms for chancrous can help to add variety to your writing and help to convey the severity of a situation or condition.