Synonyms|713Antonyms|152|Broader|9Narrower|8Related|663

125 entries under dense topic. ×

1
fixed(adjective, set, solid, heavy, short)
1
foggy(dark, gloomy, cloudy, misty)
1
gelatinous(adjective, set, solid, heavy, deep)
1
gloppy(adjective, set, solid, heavy, deep)
1
gooey(heavy, concentrated)
1
gummous(adjective, set, solid, heavy, deep)
1
gunky(adjective, set, solid, heavy, deep)
1
heaped(thick, profuse, packed, compressed)
1
jelled(adjective, set, hard, tough, solid)
1
jellied(adjective, set, solid, heavy, deep)
1
muddy(adjective, dark, gloomy, cloudy)
1
nubilous(dark, gloomy, dirty, dreary)
1
ossified(adjective, set, solid, heavy, deep)
1
ropy(heavy, concentrated)
1
set(adjective, hard, tough, firm, solid)
1
short(adjective, close, sound, solid, fast)
1
sloppy(heavy, concentrated)
1
syrupy(adjective, set, solid, heavy, deep)
1
thickened(adjective, set, solid, heavy, deep)
1
turbid(adjective, dull, set, solid, dark)
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ChicagoSmart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, impenetrable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>.
MLASmart Define. "impenetrable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms>