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

88 entries under solid topic. ×

2
compacted(adjective, set, strong, hard, firm)
2
concentrated(adjective, set, hard, tough, firm)
2
congested(adjective, close, short, substantial)
2
consolidated(adjective, close, set, firm)
2
hardened(adjective, set, strong, hard, tough)
2
jam-packed(adjective, close, strong, short)
2
solidified(adjective, set, hard, tough)
2
stiff(adjective, set, hard, tough, firm)
1
caked(adjective, set, heavy, deep)
1
clabbered(adjective, set, heavy, deep)
1
close-grained(adjective, close, set, hard, tough)
1
clotted(adjective, set, heavy, deep)
1
coagulated(adjective, set, heavy, deep)
1
congealed(adjective, set, hard, tough)
1
curdled(adjective, set, heavy, deep)
1
fixed(adjective, set, heavy, short)
1
gelatinous(adjective, set, heavy, deep)
1
gloppy(adjective, set, heavy, deep)
1
gummous(adjective, set, heavy, deep)
1
gunky(adjective, set, heavy, deep)
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ChicagoSmart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, impenetrable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/synonyms>.
MLASmart Define. "impenetrable thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/impenetrable/thesaurus/synonyms>