Source : Webster's Revised Unabridged Dictionary (1913)

Pronounceable \Pro*nounce"a*ble\, a. [Cf. L. pronunciabilis
   declarative.]
   Capable of being pronounced.

Source : WordNet®

pronounceable
     adj : capable of being uttered or pronounced; "a pronounceable
           group of letters" [ant: {unpronounceable}]