- Definitions|2
- Thesaurus|934
- Abbreviations|0
212 entries under adjective topic. ×
| narcotic(noun, medicine, drug, substance) | |
| hypnotic(noun, medicine, dull, quiet) | |
| sedative(noun, medicine, drug, substance) | |
| opiate(noun, medicine, drug, substance) | |
| somnifacient(noun, medicine, medication, inactivity) | |
| somniferous(dull, quiet, effect, heavy) | |
| soporiferous(effect, affect, inactivity, characteristics) | |
| sleepy(dull, quiet, slow, effect) | |
| boring(dull, flat, ordinary, dry) | |
| narcotizing(description, characteristics, situations) | |
| sleep-inducing(description, sleep, characteristics, situations) | |
| somnific(quiet, dark, heavy, inactivity) | |
| slumberous(noun, dull, quiet, slow) | |
| tedious(dull, flat, ordinary, dry) | |
| drowsy(dull, effect, affect, inactivity) | |
| somnolent(dull, quiet, effect, heavy) | |
| monotonous(dull, flat, ordinary, dry) | |
| tiresome(dull, flat, stupid, ordinary) | |
| wearisome(description, characteristics, weariness, situations) | |
| humdrum(dull, flat, ordinary, dry) |
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| APA | Smart Define. (2015). soporific thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/soporific/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "soporific thesaurus" https://smartdefine.org/soporific/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, soporific thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/soporific/thesaurus/synonyms>. |
| MLA | Smart Define. "soporific thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/soporific/thesaurus/synonyms> |