General:
* Rejuvenate: This is a very close synonym, implying the restoration of youthfulness or vigor.
* Renew: This implies bringing something back to a fresh or new state.
* Refresh: This suggests a simple improvement or restoration of energy.
More specific:
* Invigorate: This emphasizes the restoration of energy and vitality.
* Reactivate: This implies bringing something back to life or activity.
* Reanimate: This implies breathing new life into something.
* Revive: This implies bringing something back from a state of decline.
Consider the context:
* Are you talking about a person, a business, a city, or an idea?
* Is the focus on restoring energy, vitality, or a sense of newness?
The best synonym will depend on the specific meaning you want to convey.