Congenital Myasthenic Syndrome (CMS) is a rare genetic condition that affects the neuromuscular junction. There are no true antonyms for CMS, as it is a specific medical diagnosis. However, antonyms for the symptoms of CMS could be strength, energy, and vitality. People with CMS may experience muscle weakness, fatigue, and difficulty with respiratory function. Antonyms for these symptoms could be muscular power, endurance, and healthy breathing. While there is no known cure for CMS, treatment options, such as medication and physical therapy, can help manage symptoms and improve quality of life.