"Necrosis" is a synonym for the word "narcoma" and refers to the death of cells or tissues in the body. "Gangrene" is another synonym for "narcoma" and refers to the decay or death of body tissues caused by a lack of blood flow or infection. "Grisel's syndrome" is a rare medical condition that affects the spine and can cause a type of narcoma known as "atlanto-axia subluxation." Other possible synonyms for "narcoma" might include "tumor," "mass," or "lesion," depending on the specific context and nature of the medical condition being described.