| uneventful(dull, late, behind) | |
| wasted(adjective, weary) | |
| wayworn(adjective, weary, fatigued) | |
| dilatory(adjective, dull, quiet, moderate, easy) | |
| abeyant(adjective, dull, idle, sluggish, lazy) | |
| acquiescent(adjective, quiet, flat, indifferent, apathetic) | |
| aestivation | |
| all in(expression, adjective, beat, weary, tired) | |
| anaesthetised | |
| anesthetized | |
| asleep on the job(expression, idiom, dull, idle, sluggish) | |
| balmy | |
| bearing(adjective, quiet, flat, indifferent, apathetic) | |
| besotted(adjective, dull) | |
| blase | |
| bone-tired(adjective, beat, gloomy, sick, depressed) | |
| boorish(adjective, dull) | |
| burned out(expression, adjective, beat, weary, tired) | |
| bushed(adjective, beat, gloomy, depressed, weary) | |
| careless(dull, idle, sluggish, inactive, lethargic) |
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| APA | Smart Define. (2016). sleepy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, sleepy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>. |
| MLA | Smart Define. "sleepy thesaurus" 18 February 2016. Web. 24 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms> |