Added 9 October 2026 vigorousness noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about vigorousness at Wordnik → Where our words come from → The quality of being vigorous. Related Words: vigourousnessvibrancyvehementnessvivacityinvigoratingnessvalorousnessvirilityferventnessvivaciousnessvividnessfervidityfervidness Back to today's word