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The Collaborative International Dictionary
Vociferousness

Vociferous \Vo*cif"er*ous\, a. [Cf. F. vocif[`e]re.] Making a loud outcry; clamorous; noisy; as, vociferous heralds. -- Vo*cif"er*ous*ly, adv. -- Vo*cif"er*ous*ness, n.

Wiktionary
vociferousness

n. The state of being vociferous.