The Collaborative International Dictionary of English v.0.48:
Pronounceable \Pro*nounce"a*ble\, a. [Cf. L. pronunciabilis declarative.] Capable of being pronounced. [1913 Webster]WordNet (r) 3.0 (2006):
pronounceable adj 1: capable of being uttered or pronounced; "a pronounceable group of letters" [ant: unpronounceable]