Added 9 October 2026 tranquility /træŋˈkwɪlɪti/ noun Categories: Describing WordsFeelingsRare Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about tranquility at Wordnik → Where our words come from → American standard spelling of tranquillity. Related Words: tranquillityplacidityserenityquietudequietnessquietreposecalmnesscalmpeacelullpalliative Back to today's word