Synonyms|471Antonyms|205|Broader|3Narrower|9Related|940
1
hands off(expression, adjective, quiet, flat, indifferent)
1
having spring fever(expression, adjective, idiom, dull, stupid)
1
hebetudinous
1
humdrum
1
idleness
1
impassive(adjective, dull, slow, relaxed, still)
1
in a stupor(expression, idiom)
1
in holding pattern(expression, adjective, idiom, dull, idle)
1
inattentive(dull, idle, sluggish, inactive, lethargic)
1
inoperative(adjective, dull, idle, sluggish, lazy)
1
insouciant(adjective, lifeless, lethargic, languid, indolent)
1
lagging(dull, idle, sluggish, lifeless, inactive)
1
laid-back(adjective, quiet, slow, relaxed, indifferent)
1
latent(adjective, dull, quiet, flat, indifferent)
1
lax(adjective, dull, idle, sluggish, lazy)
1
leisurely
1
lethargical
1
lethargy
1
loafing(dull, idle, sluggish, inactive, lethargic)
1
long-suffering(adjective, quiet, flat, indifferent, apathetic)
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APASmart Define. (2016). sleepy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sleepy/thesaurus/synonyms
ChicagoSmart Define. 2016. "sleepy thesaurus" https://smartdefine.org/sleepy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, sleepy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sleepy/thesaurus/synonyms>.
MLASmart Define. "sleepy thesaurus" 18 February 2016. Web. 25 September 2026. <https://smartdefine.org/sleepy/thesaurus/synonyms>