Atonement
Part of speech: noun
Definition: A repair done for the sake of a damaged relationship. The reconciliation of God and mankind through the death of Jesus.
Example sentence: True atonement isn't the periodic shaving of karmic stubble via confessional; it requires deep, truthful change. It means doing the hardest thing of all: not making the same stupid mistake again.
Expiation
Part of speech: noun
Definition: An act of atonement for a sin or wrongdoing.