The word "Reflex Sympathetic Dystrophies" is a medical condition that causes chronic and severe pain, characterized by swelling, stiffness, and temperature changes. The antonyms for this term can vary, depending on the context. In terms of physical symptoms, the antonyms could be relief, ease, comfort, or well-being. However, in the medical field, some possible antonyms could be misdiagnosis or under-treatment, as Reflex Sympathetic Dystrophies is a complex and often misunderstood condition that requires accurate diagnosis and proper treatment. Other antonyms could include wellness, health, and vitality, as those are the goals that patients with this condition strive to achieve.