If "charter" means a document granting rights or privileges:
* Abolish: This implies completely doing away with the rights or privileges granted by the charter.
* Revoke: This means officially taking back the rights or privileges.
* Cancel: This is a more general term for ending the validity of the charter.
* Repeal: This is specifically used to describe the cancellation of a law or regulation.
If "charter" means a document establishing a corporation or organization:
* Dissolve: This implies the complete termination of the organization.
* Liquidate: This is a more formal term for dissolving an organization.
* Close: This is a more general term for ending the operations of the organization.
If "charter" means to hire a vehicle or service:
* Own: This implies owning the vehicle or service rather than renting it.
* Purchase: This implies buying the vehicle or service outright.
* Rent: This implies renting a different vehicle or service, though it's not necessarily an antonym.
To understand the best antonym, you need to consider the context in which "charter" is being used.