The Collaborative International Dictionary of English v.0.48:
Surmountable \Sur*mount"a*ble\, a. [Cf. F. surmontable.] Capable of being surmounted or overcome; superable. -- Sur*mount"a*ble*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
surmountable adj 1: capable of being surmounted or overcome; "situations of measurable and surmountable danger" [ant: insurmountable, unsurmountable] 2: capable of being surmounted [syn: surmountable, climbable]