This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. the state of being voluble

n. the degree to which someone is voluble

n. The quality or state of being voluble (in any of the senses of the adjective).

n. Easy, swift, rolling motion; the property of moving in an easy, rolling manner.

n. The state or character of being voluble in speech; excessive fluency or readiness in speaking; unchecked flow of talk.

n. A rolling or revolving; aptness to roll; revolution; hence, mutability.

n. the quality of being facile in speech and writing

"He is exploring the idea of "volubility," the opposite of quietness."

communicativeness   

vivacity    fluency    loquacity    alacrity    fecundity    promptitude    quickness    vigour    frankness    impetuosity