Capable of being surmounted or overcome.

Roget 470: possible; in the cards, on the dice; in posse, within the bounds of possibility, conceivable, credible; compatible etc. 23; likely.    practicable, feasible, performable, achievable; within reach, within measurable distance; accessible, superable^†, surmountable; attainable, obtainable; contingent etc. (doubtful) 475, (effect) 154.    barely possible, marginally possible, just possible; possible but improbably, (improbable) 473; theoretically possible.    ... show more

Capable of being surmounted.

synonym: climbable.