One of the synonyms for the term "most atonable" is "most redeemable". This refers to making up for a wrongdoing or mistake in a way that can be forgiven or compensated for. Other synonyms for "most atonable" include "most expiable", which means capable of being atoned for or forgiven, and "most reparable", which suggests that something can be fixed or remedied. The word "most correctable" is also used as a synonym for "most atonable". Essentially, all these synonyms convey the same idea of acknowledging a mistake and taking steps to make amends for it, in a way that allows for forgiveness and restoration.