General synonyms:
* Authorize: To give power or authority to.
* Enable: To give someone the means or opportunity to do something.
* Strengthen: To make someone stronger or more confident.
* Validate: To confirm or support someone's abilities or worth.
* Uphold: To support or defend someone's rights or interests.
More specific synonyms:
* Liberate: To free from oppression or control.
* Emancipate: To set free from slavery or oppression.
* Incite: To encourage or stir up someone to action.
* Motivate: To provide someone with a reason to act.
* Inspire: To fill someone with the urge to do something great.
Informal synonyms:
* Boost: To increase someone's confidence or abilities.
* Give someone wings: To give someone the freedom to do something.
The best synonym to use will depend on the specific meaning you are trying to convey.