trusteeship (n.)

• agency
• assignment
• authority
• authorization
• brevet
• care
• charge
• commission
• commissioning
• commitment
• consignment
• cure
• delegation
• deputation
• devolution
• devolvement
• embassy
• empowerment
• errand
• jurisdiction
• legation
• license
• lieutenancy
• mandate
• mission
• office
• proxy
• purview
• regency
• responsibility
• task
• trust
• warrant