90 entries under tough topic. ×

7
viscid(adjective, dense, concentrated, tacky)
6
ropy(adjective, stiff, dense, concentrated)
5
congealed(adjective, set, hard, firm)
5
impermeable(adjective, close, set, hard)
5
jelled(adjective, set, hard, firm)
5
rough(adjective, strong, hard, simple)
5
syrupy(adjective, stiff, dense, concentrated)
4
gooey(adjective, dense, concentrated, tacky)
4
mucilaginous(adjective, tacky, sticky, gelatinous)
4
rigid(adjective, strong, hard, firm)
4
slimy(uncleanness, tacky, sticky, viscous)
3
harsh(adjective, strong, hard, simple)
3
solidified(adjective, set, hard, firm)
2
adhesive(noun, covering, tacky, sticky)
2
clammy(tacky, sticky, viscous)
2
rigorous(adjective, strong, hard, sturdy)
2
robust(adjective, person, body, strong, hard)
2
sturdy(adjective, person, close, set, body)
2
unyielding(adjective, strong, hard, firm)
1
adamantine(adjective, strong, hard, firm)
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APASmart Define. (2016). thick thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/thick/thesaurus/synonyms
ChicagoSmart Define. 2016. "thick thesaurus" https://smartdefine.org/thick/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, thick thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/thick/thesaurus/synonyms>.
MLASmart Define. "thick thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/thick/thesaurus/synonyms>