The Collaborative International Dictionary of English v.0.48:

Curable \Cur"a*ble\ (k?r"?-b'l), a. [Cf. F. curable. See Cure,
   v. t.]
   Capable of being cured; admitting remedy. "Curable diseases."
   --Harvey. -- Cur"a*ble*ness, n. -- Cur`a*bly, adv.
   [1913 Webster] Cura[,c]ao

WordNet (r) 3.0 (2006):

curable
    adj 1: curing or healing is possible; "curable diseases" [ant:
           incurable]
    2: capable of being hardened by some additive or other agent

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "curable":
   ameliorable, amendable, correctable, corrigible, emendable,
   fixable, improvable, medicable, mendable, reclaimable, recoverable,
   rectifiable, recyclable, redeemable, remediable, repairable,
   reparable, restorable, retrievable, reversible