Source : Webster's Revised Unabridged Dictionary (1913)

Reformable \Re*form"a*ble\ (r?*f?rm"?*b'l), a.
   Capable of being reformed. --Foxe.

Source : WordNet®

reformable
     adj : susceptible to improvement or reform; "a redeemable sinner"
           [syn: {redeemable}]