There are several synonyms for the term "regain one's health." These include "recover," "heal," "recuperate," "convalesce," "mend," "rehabilitate," "respire," "revive," "restore," and "renovate." All of these words imply a return to a state where an individual's physical and/or mental well-being has improved and they are able to resume their daily activities. Whether it's recovering from an illness, injury, or surgery, or simply taking steps to improve one's overall health and well-being, these words all connote a sense of renewal and rejuvenation, and the realization that one's health is one of the most precious gifts they have in life.