Verses with the word atonement in the Apocrypha (3 verses):

Sirach 3:3
Whoso honoureth his father maketh an atonement for his sins:

Sirach 3:30
Water will quench a flaming fire; and alms maketh an atonement for sins.

2 Maccabees 3:33
Now as the high priest was making an atonement, the same young men in the same clothing appeared and stood beside Heliodorus, saying, Give Onias the high priest great thanks, insomuch as for his sake the Lord hath granted thee life: