Wordnet 3.0
NOUN (1)
1. 
 someone who expresses in language; 
 someone who talks (especially someone who delivers a public speech or someone especially garrulous); 
- Example: "the speaker at commencement"- Example: "an utterer of useful maxims"[syn: speaker, talker, utterer, verbalizer, verbaliser]
WordNet (r) 3.0 (2006):
verbalizer
    n 1: someone who expresses in language; someone who talks
         (especially someone who delivers a public speech or someone
         especially garrulous); "the speaker at commencement"; "an
         utterer of useful maxims" [syn: speaker, talker,
         utterer, verbalizer, verbaliser]