Added 9 October 2026 vivaciousness noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about vivaciousness at Wordnik → Where our words come from → the state of being vivacious; vivacity Related Words: vivacityvibrancyvividnessvividitylivingnessalivenessvitalityvigorousnessvitalnessvigourousnessvibeynessinvigoratingness Back to today's word