- Definitions|2
- Thesaurus|934
- Abbreviations|0
| besotted(adjective, dull) | |
| big yawn(expression, adjective, dull, flat, stupid) | |
| black stuff | |
| blase | |
| blue angel | |
| blue devil | |
| blue heaven | |
| blue velvet | |
| blunt(adjective, dull) | |
| boorish(adjective, dull) | |
| bromide(noun, bother, drag, nuisance, yawn) | |
| bummer(noun, bother, drag, nuisance, yawn) | |
| calmant | |
| cataleptic | |
| chloral hydrate | |
| cloddish(adjective, dull) | |
| codeine | |
| codeine cough syrup(expression, idiom) | |
| colorless(adjective, dull, flat, ordinary, dry) | |
| colourless |
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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> |