12
shirk(verb, do, neglect, avoid, relax)
12
slacken(verb, stop, calm, quiet, reduce)
12
slothful(adjective, dull, quiet, flat, slow)
11
dilatory(adjective, dull, quiet, moderate, easy)
11
flabby(adjective, clear, separate, weak, free)
11
let up(verb, expression, phrasal verb, stop, calm)
11
baggy(adjective, clear, separate, weak, free)
11
floppy(adjective, weak, soft, loose, lifeless)
11
inattentive(noun, adjective, dull, careless, indifferent)
11
languid(adjective, dull, quiet, easy, flat)
11
relaxed(verb, adjective, clear, separate, free)
11
work-shy(adjective, idle, lazy, indolent, faineant)
10
lethargic(adjective, dull, quiet, slow, careless)
9
decrease(noun, verb, reduce, release, moderate)
9
laziness(noun, inactivity, lethargy, languor, idleness)
9
lingering(dull, slow, late, lazy, remiss)
9
moderate(verb, adjective, calm, dull, quiet)
9
slake(verb, release, decrease, relax, satisfy)
9
tardy(adjective, dull, slow, sluggish, late)
8
abate(verb, calm, quiet, reduce, release)
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APASmart Define. (2016). slack thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/slack/thesaurus/synonyms
ChicagoSmart Define. 2016. "slack thesaurus" https://smartdefine.org/slack/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, slack thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/slack/thesaurus/synonyms>.
MLASmart Define. "slack thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/slack/thesaurus/synonyms>