13
sedative(noun, adjective, medicine, drug, agent)
7
soporific(noun, drug)
7
tranquilizer
7
tranquilliser
6
ataractic
6
narcotic
5
analgesic
5
calmative(noun, drug)
5
opiate
4
antianxiety agent(noun, expression, idiom)
4
ataractic drug(noun, expression, idiom)
4
barbiturate(noun, drug)
4
downer
3
anodyne
3
ataractic agent(noun, expression, idiom)
3
hypnotic
2
calmer
2
drug
2
painkiller
2
quieter
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APASmart Define. (2015). tranquillizer thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/tranquillizer/thesaurus/synonyms
ChicagoSmart Define. 2015. "tranquillizer thesaurus" https://smartdefine.org/tranquillizer/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, tranquillizer thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/tranquillizer/thesaurus/synonyms>.
MLASmart Define. "tranquillizer thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/tranquillizer/thesaurus/synonyms>