- Definitions|2
- Thesaurus|152
- Abbreviations|0
| soporific(adjective, dull, quiet, heavy, inactivity) | |
| somnific(adjective, quiet, slow, dark, heavy) | |
| hypnotic(adjective, dull, quiet, dark, heavy) | |
| narcotic(noun, adjective, dull, quiet, slow) | |
| somnifacient(noun, adjective, dull, quiet, dark) | |
| opiate(noun, adjective, dull, quiet, slow) | |
| somnolent(adjective, dull, quiet, dark, heavy) | |
| soporiferous(adjective, inactivity) | |
| hypnogogic | |
| sleepy(adjective, inactivity, awareness) | |
| drowsy | |
| hypnagogic | |
| slumberous(adjective, awareness) | |
| sedative(noun, adjective, dull, quiet, slow) | |
| anodyne | |
| dull | |
| heavy | |
| lethargic(adjective, inactivity) | |
| slow | |
| analgesic |
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| APA | Smart Define. (2015). somniferous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/somniferous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "somniferous thesaurus" https://smartdefine.org/somniferous/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, somniferous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/somniferous/thesaurus/synonyms>. |
| MLA | Smart Define. "somniferous thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/somniferous/thesaurus/synonyms> |