Added 10 October 2026 capaciousness noun Categories: Mind & IdeasDescribing WordsObscure Words noun ! Definition from Wiktionary (CC BY-SA). More about capaciousness at Wordnik → Where our words come from → The quality of being capacious. Related Words: roominessspaciousnesscommodiousnessincapaciousnesscopiousnessamplenesslargenessvastnessexpandingnessspaciositygenerosityexpandedness Back to today's word