The Collaborative International Dictionary of English v.0.48:

Retrievable \Re*triev"a*ble\, a. [From Retrieve.]
   That may be retrieved or recovered; admitting of retrieval.
   -- Re*triev"a*ble*ness, n. -- Re*triev"a*bly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

retrievable
    adj 1: capable of being regained especially with effort; "he
           believed the information was retrievable"

Moby Thesaurus II by Grady Ward, 1.0:

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