68 entries under unintelligent topic. ×

57
slow(adjective, dull, quiet, increase, weak)
27
indolent(adjective, action, dull, quiet, simple)
24
dull(adjective, calm, dull, increase, weak)
24
plodding(adjective, hard, difficult, slow, deliberate)
10
dopey(adjective, action, dull, quiet, weak)
8
obtuse(adjective, dull, simple, slow, stupid)
8
stupid(adjective, action, dull, simple, slow)
7
dense(adjective, dull, simple, slow, silly)
6
dim(adjective, dull, simple, slow)
6
stupefied(adjective, dull, simple, slow, cold)
5
backward(adjective, adverb, dull, simple, low)
4
boring(adjective, dull, quiet, simple, flat)
4
dumb(adjective, dull, simple, slow, silly)
3
doltish(adjective, dull, simple, slow, stupid)
2
besotted(adjective, dull, simple, slow, stupid)
2
dim-witted(adjective, simple, slow, stupid)
2
stolid(adjective, calm, dull, quiet, simple)
2
tedious(dull, simple, slow, late)
2
thick-headed(dull, witless)
2
wearisome(adjective, simple, slow, stupid)
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APASmart Define. (2016). sluggish thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/sluggish/thesaurus/synonyms
ChicagoSmart Define. 2016. "sluggish thesaurus" https://smartdefine.org/sluggish/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, sluggish thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/sluggish/thesaurus/synonyms>.
MLASmart Define. "sluggish thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/sluggish/thesaurus/synonyms>