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

52 entries under set topic. ×

1
indurated(adjective, hard, firm, stiff)
1
jelled(adjective, hard, tough, solid)
1
jellied(adjective, solid, heavy, deep)
1
ossified(adjective, solid, heavy, deep)
1
syrupy(adjective, solid, heavy, deep)
1
thickened(adjective, solid, heavy, deep)
1
turbid(adjective, dull, solid, dark)
1
vitrified(adjective, solid, heavy, deep)
0
hard-handed(adjective, strong, hard, compact)
0
hard as nails(expression, adjective, idiom, strong)
0
indurate(adjective, strong, hard, firm)
0
iron(adjective, strong, hard, firm)
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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>