The Collaborative International Dictionary of English v.0.48:

Vociferate \Vo*cif"er*ate\, v. t. [imp. & p. p. Vociferated;
   p. pr. & vb. n. Vociferating.]
   To utter with a loud voice; to shout out.
   [1913 Webster]

         Though he may vociferate the word liberty. --V. Knox.
   [1913 Webster]