50 entries under lackluster topic. ×
| stretchy(adjective, dull, stupid, idle, weary) | |
| dilatory(adjective, dull, quiet, moderate, easy) | |
| having spring fever(expression, adjective, idiom, dull, stupid) | |
| impassive(adjective, dull, slow, relaxed, still) | |
| laid-back(adjective, quiet, slow, relaxed, indifferent) | |
| moony(adjective, quiet, flat, slow, relaxed) | |
| nebbish(adjective, dull, slow, relaxed, stupid) | |
| sleepyhead(adjective, dull, quiet, slow, relaxed) | |
| stolid(adjective, dull, quiet, indifferent, still) | |
| wimpy(adjective, dull, slow, relaxed, stupid) |
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| APA | Smart Define. (2016). sleepy thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2016, sleepy thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>. |
| MLA | Smart Define. "sleepy thesaurus" 18 February 2016. Web. 30 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms> |