TRANQUIL Synonyms: 169 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/tranquil
WEBSynonyms for TRANQUIL: quiet, peaceful, serene, placid, restful, calm, hushed, quieted; Antonyms of TRANQUIL: loud, boisterous, tumultuous, raucous, noisy, rowdy, unquiet, clamorous
DA: 27 PA: 80 MOZ Rank: 1