vindicator

transitive verb vindicated, vindicating

1. to clear from criticism, blame, guilt, suspicion, etc.; uphold by evidence or argument
2. to defend or maintain (a cause, claim, etc.) against opposition
3. to serve as justification for; justify: a success which vindicated their belief in him
4. to lay claim to or establish possession of (something for oneself or another)
5. Obsolete
   1. to avenge
   2. to punish