Select the most appropriate one-word substitution for the given group of words. 

An act of returning something that was lost or stolen to its owner.

Restitution

The most appropriate one-word substitution for an act of returning something that was lost or stolen to its owner is restitution.

• Restitution is the act of restoring something to its rightful owner.
• Rescuing is the act of saving someone or something from danger.
• Resolution is the act of solving a problem or issue.
• Respite is a temporary relief from something difficult or unpleasant.

The word restitution is derived from the Latin word restituere, meaning "to restore". It is the act of returning something to its rightful owner, either voluntarily or by legal means. Restitution can be made for a variety of reasons, such as to compensate for a loss or to make amends for a wrong.