Over-stressing is an unhealthy condition that can lead to a host of physical, mental and emotional problems. Some antonyms for over-stress can include relaxation, calmness, tranquility, balance, peace, and serenity. Instead of constantly worrying about the things that are stressing you out, focus on creating a more tranquil and balanced environment in which to live. Implement strategies such as deep breathing exercises, meditation, and yoga to help you relax and maintain a calm state of mind. Additionally, set realistic goals and prioritize your tasks each day, avoiding overworking yourself and placing too much pressure on your mind and body.