excuser

/ɪkˈskjuzər/
noun
  1. A person who forgives or overlooks a fault or mistake.
    • The teacher was a patient excuser of late homework when students had good reasons.
    • As an excuser of minor errors, the manager kept the team's morale high.
    • She was known as a generous excuser of her friends' bad habits.
  2. A person who provides a reason or justification for something.
    • She didn't want to be seen as an excuser of bad behavior, so she spoke up.
    • The politician was a skilled excuser of unpopular policies.
    • He was always an excuser for his own failures, blaming others instead.
Antonyms