63 entries under hard topic. ×

1
close-grained(adjective, tough, solid, rigid)
1
compact(adjective, set, tough, solid)
1
compressed(adjective, set, tough, solid)
1
concentrated(verb, adjective, set, tough)
1
concrete(adjective, set, tough, solid)
1
condensed(verb, adjective, set, tough)
1
contracted(adjective, firm, solid, tense)
1
creaky(adjective, firm, solid, tense)
1
fine-grained(adjective, tough, solid, rigid)
1
frozen(adjective, firm, solid, tense)
1
graceless(adjective, firm, solid, tense)
1
immalleable(adjective, firm, solid, stiff)
1
impenetrable(adjective, set, tough, solid)
1
impervious(adjective, set, tough, solid)
1
impliable(adjective, firm, solid, stiff)
1
incompliant(adjective, firm, solid, tense)
1
indurate(adjective, firm, solid, tense)
1
inelastic(adjective, tough, firm, solid)
1
inflexible(adjective, tough, firm, solid)
1
mechanical(adjective, firm, solid, tense)
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APASmart Define. (2015). jelled thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/jelled/thesaurus/synonyms
ChicagoSmart Define. 2015. "jelled thesaurus" https://smartdefine.org/jelled/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, jelled thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/jelled/thesaurus/synonyms>.
MLASmart Define. "jelled thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/jelled/thesaurus/synonyms>