Horton Giant Cell Arteritis is a medical condition that causes inflammation of the arteries in the head and neck, leading to symptoms such as headaches, vision loss, and jaw pain. However, when it comes to antonyms for this condition, we can look at words that indicate the absence of inflammation, such as calmness, tranquility, or peace. Other antonyms could include health, wellness, or vitality, as Horton Giant Cell Arteritis can cause a decline in overall health and quality of life. In any case, it is crucial to consult a healthcare professional for proper diagnosis and treatment of this condition.