| sedentary(adjective, dull, idle, sluggish, lazy) | |
| slack(dull, still, idle, sluggish, late) | |
| sleepy-eyed | |
| sleepyheaded | |
| slumbering | |
| slumbery(adjective, awareness) | |
| somniferous(adjective, inactivity, awareness) | |
| spiritless(adjective, dull, slow, relaxed, still) | |
| stagnant(dull, sluggish, late, lazy, listless) | |
| stationary(adjective, inactive, motionless, unmoving) | |
| stuporous(adjective, lethargic) | |
| work-shy(adjective, idle, lazy, indolent, faineant) | |
| worn-out(adjective, weary, fatigued) | |
| dopey(adjective, dull, quiet, slow, relaxed) | |
| stupid(adjective, dull, cold, dead, senseless) | |
| unemployed(adjective, dull, idle, sluggish, lazy) | |
| cheerless(adjective, weary) | |
| dazed(adjective, slow, tired, lethargic, unsteady) | |
| draggy(adjective, dull, quiet, low, slow) | |
| feeble(adjective, weary) |
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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> |