Search Result for "vociferator": 
Wordnet 3.0

NOUN (1)

1. a loud and vehement speaker (usually in protest); 



The Collaborative International Dictionary of English v.0.48:

Vociferator \Vo*cif"er*a`tor\, n.
   One who vociferates, or is clamorous. [R.]
   [1913 Webster]


WordNet (r) 3.0 (2006):

vociferator
    n 1: a loud and vehement speaker (usually in protest)