The word "abolish” means to formally put an end to a system, practice, or institution.
Option A: "cancel" — This is a synonym of abolish.
Option B: "rescind" — Also similar in meaning, means to revoke or repeal.
Option C: "terminate" — Again, similar in meaning; it implies ending something.
Option D: "restore" — This is the opposite of abolish; it means to bring back or reinstate something.
Therefore, the correct antonym is restore.