WordNet (r) 3.0 (2006):

phonate
    v 1: utter speech sounds [syn: vocalize, vocalise,
         phonate]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "phonate":
   articulate, breathe, chime, chorus, come out with, communicate,
   convey, deliver, disclose, emit, enunciate, express, fling off,
   formulate, give, give expression, give out with, give tongue,
   give utterance, give voice, impart, let out, lip, out with, phrase,
   pour forth, present, pronounce, put forth, put in words, raise,
   say, set forth, sound, tell, throw off, utter, verbalize, vocalize,
   voice, whisper, word