Synonyms|3Antonyms|0|Broader|0Narrower|0Related|0
1
hypnotic
1
narcotic
1
soporific
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APASmart Define. (2015). sleep-causing thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/sleep-causing/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleep-causing thesaurus" https://smartdefine.org/sleep-causing/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, sleep-causing thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/sleep-causing/thesaurus/synonyms>.
MLASmart Define. "sleep-causing thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/sleep-causing/thesaurus/synonyms>