10
unintelligent(adjective, characteristic, dull, simple, slow)
9
crowded(adjective, close, strong, firm, solid)
9
deep(adjective, rough, large, fat, dense)
9
dim(adjective, dull, simple, obscure, slow)
9
foggy(adjective, dull, obscure, property, dim)
9
heavyset(adjective, heavy, short, sturdy, fat)
9
imbecilic(adjective, dull, simple, slow, foolish)
9
indistinct(adjective, dull, obscure, rough, property)
9
insensitive(adjective, slow, stupid, dull-witted)
9
luxuriant(adjective, big, profusely)
9
obscure(adjective, dull, solid, property, dim)
9
simple(adjective, dull, slow, silly, foolish)
9
teeming(adjective, full, busy, dense, multitude)
8
abundant(adjective, great, big, dense, luxuriant)
8
ample(adjective, size)
8
compressed(adjective, close, set, hard, tough)
8
feeble-minded(adjective, simple, slow, foolish, stupid)
8
full(adjective, open, large, busy, dense)
8
glutinous(adjective, quality, tough, syrupy, tacky)
8
gummy(adjective, quality, dense, concentrated, tacky)
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APASmart Define. (2016). thick thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/thick/thesaurus/synonyms
ChicagoSmart Define. 2016. "thick thesaurus" https://smartdefine.org/thick/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, thick thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/thick/thesaurus/synonyms>.
MLASmart Define. "thick thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/thick/thesaurus/synonyms>