vociferator

vo·cif·er·ate

 (vō-sĭf′ə-rāt′)

tr. & intr.v. vo·cif·er·at·ed, vo·cif·er·at·ing, vo·cif·er·ates

To utter (something) or cry out loudly and vehemently, especially in protest.

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[Latin vōciferārī, vōciferāt-, from *vōcifer, carrying the voice : vōx, vōc-, voice; see voice + -fer, -fer.]

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vo·cif′er·a′tion n.

vo·cif′er·a′tor n.

Thesaurus

Noun

1.

vociferator - a loud and vehement speaker (usually in protest) speaker, talker, verbaliser, verbalizer, utterer - 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"