| down(adjective, dull, low, still, idle) | |
| doze off(verb, expression, phrasal verb) | |
| dozing | |
| drained(adjective, beat, gloomy, weary, tired) | |
| dreaming | |
| drooping(adjective, beat, relaxed, weary, tired) | |
| drugged with sleep(expression, idiom) | |
| enduring(adjective, quiet, flat, indifferent, apathetic) | |
| estivation | |
| exanimate | |
| fagged(adjective, beat, weary, tired, stale) | |
| fed up(expression, adjective, beat, weary, tired) | |
| flagged(adjective, fatigued) | |
| footsore(adjective, weary) | |
| forbearing(adjective, quiet, flat, indifferent, apathetic) | |
| frigid | |
| going through motions(expression, adjective, idiom, quiet, flat) | |
| gone | |
| gradual(dull, late, behind) | |
| half-awake |
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| APA | Smart Define. (2016). sleepy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, sleepy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>. |
| MLA | Smart Define. "sleepy thesaurus" 18 February 2016. Web. 25 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms> |