70 entries under noun topic. ×

5
dull(adjective, dull, dry, boring)
5
anaesthetic(adjective, dull, drug, dope)
5
deadening(adjective, dull, sleepy, balmy)
5
depressant(medicine, substance, agent)
5
sleeping draught(expression, idiom, medicine, substance)
3
tranquilliser
2
barbiturate
2
bore(drag, nuisance, yawn, nonevent)
1
nodding(adjective, dull, quiet, tired)
1
opium(medicine, substance, agent, narcotic)
1
bromide(bother, drag, nuisance, yawn)
1
bummer(bother, drag, nuisance, yawn)
1
creep(bother, drag, nuisance, yawn)
1
dart
1
deadhead(bother, drag, nuisance, yawn)
1
drag(bother, nuisance, yawn, nonevent)
1
drip(bother, drag, nuisance, yawn)
1
dull person(expression, bother, drag, nuisance)
1
flat tire(expression, bother, drag, nuisance)
1
headache(bother, drag, nuisance, yawn)
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APASmart Define. (2015). soporific thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/soporific/thesaurus/synonyms
ChicagoSmart Define. 2015. "soporific thesaurus" https://smartdefine.org/soporific/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, soporific thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/soporific/thesaurus/synonyms>.
MLASmart Define. "soporific thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/soporific/thesaurus/synonyms>