Synonyms|160Antonyms|1|Broader|6Narrower|0Related|37

50 entries under lackluster topic. ×

1
indolent(adjective, relaxed, weary, tired, sluggish)
1
inert(adjective, dull, weak, easy, slow)
1
lackadaisical(adjective, dull, weak, easy, slow)
1
laid-back(adjective, dull, weak, easy, slow)
1
languorous(adjective, dull, weak, easy, slow)
1
lazy(adjective, dull, weak, easy, slow)
1
listless(adjective, dull, quiet, weak, easy)
1
moony(adjective, dull, weak, easy, slow)
1
nebbish(adjective, dull, weak, easy, slow)
1
out of it(expression, adjective, idiom, quiet, slow)
1
passive(adjective, dull, stupid, idle, weary)
1
phlegmatic(adjective, dull, weak, easy, slow)
1
slothful(adjective, dull, stupid, weary, apathetic)
1
sluggish(adjective, dull, quiet, weak, easy)
1
slumberous(adjective, dull, quiet, slow, heavy)
1
somnolent(adjective, dull, quiet, slow, relaxed)
1
spiritless(adjective, dull, weak, easy, slow)
1
stolid(adjective, dull, weary, apathetic, tired)
1
stretchy(adjective, dull, stupid, weary, apathetic)
1
stupefied(adjective, dull, stupid, idle, weary)
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APASmart Define. (2015). sleepyhead thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sleepyhead/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleepyhead thesaurus" https://smartdefine.org/sleepyhead/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, sleepyhead thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sleepyhead/thesaurus/synonyms>.
MLASmart Define. "sleepyhead thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/sleepyhead/thesaurus/synonyms>