47 entries under solid topic. ×

12
unyielding(adjective, tough, firm, resist)
11
inflexible(adjective, tough, firm, resist)
7
refractory(adjective, hard, tough, firm, difficult)
6
firm(adjective, tough, determined, stiff)
3
fixed(adjective, hard, firm, stiff)
3
indurate(adjective, firm, determined, resolute)
3
steely(adjective, firm, determined, resolute)
2
hard(adjective, severe, firm, stiff)
2
inelastic(adjective, hard, tough, severe, firm)
1
annealed(adjective, hard, firm, tense)
1
arthritic(adjective, hard, firm, tense)
1
benumbed(adjective, hard, firm, tense)
1
brittle(adjective, hard, firm, tense)
1
buckram(adjective, hard, firm, tense)
1
cemented(adjective, hard, firm, tense)
1
chilled(adjective, hard, firm, tense)
1
congealed(adjective, hard, firm, tense)
1
contracted(adjective, hard, firm, tense)
1
creaky(adjective, hard, firm, tense)
1
frozen(adjective, hard, firm, tense)
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APASmart Define. (2015). incompliant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/incompliant/thesaurus/synonyms
ChicagoSmart Define. 2015. "incompliant thesaurus" https://smartdefine.org/incompliant/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, incompliant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/incompliant/thesaurus/synonyms>.
MLASmart Define. "incompliant thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/incompliant/thesaurus/synonyms>