The Collaborative International Dictionary of English v.0.48:
Achievable \A*chiev"a*ble\, a. Capable of being achieved. --Barrow. [1913 Webster]WordNet (r) 3.0 (2006):
achievable adj 1: capable of existing or taking place or proving true; possible to do [syn: accomplishable, achievable, doable, manageable, realizable]