A healthy body is a crucial factor in living a happy and fulfilling life. Synonyms for a healthy body include fit, robust, hale, sound, and hearty. Fitness emphasizes physical strength and flexibility, while robust suggests sturdiness and resiliency. Hale implies an overall wholeness and well-being, while sound suggests a lack of illness or injury. Hearty suggests vitality and fullness of life. Other synonyms for a healthy body include flourishing, thriving, and active. All of these words convey the importance of taking care of our bodies in order to lead enjoyable and productive lives.