Autonomic imbalance refers to a condition where the body's automatic functions are disrupted. As such, the antonyms for this phrase would be words that describe a healthy, balanced functioning of the body's automatic processes. These include: homeostasis, equilibrium, stability, balance, and harmony. In a healthy body, the autonomic nervous system operates smoothly, keeping a balance between sympathetic (fight or flight) and parasympathetic (rest and digest) functions. When this balance is disrupted, it can lead to a range of health issues, including anxiety, high blood pressure, and digestive problems. Therefore, maintaining a state of homeostasis and balance is crucial for overall health and wellbeing.