226 entries under solid topic. ×

3
refractory(adjective, hard, tough, rough, firm)
3
steely(adjective, hard, firm, rigid)
3
sturdy(adjective, close, strong, hard, sound)
3
thick(adjective, strong, hard, firm)
3
undoubted(adjective, clear, sound, firm, plain)
3
unquestioning(adjective, set, clear, firm)
2
clinched(verb, adjective, set, certain)
2
clotted(adjective, set, heavy, deep)
2
contracted(verb, adjective, hard, slight, fine)
2
dead set on(expression, adjective, idiom, strong, secure)
2
ensured(verb, adjective, set, certain)
2
hardened(adjective, set, hard, complete, firm)
2
harsh(adjective, mean, hard, severe, rough)
2
incompliant(adjective, hard, firm, stiff)
2
irrefutable(adjective, clear, sound, firm, plain)
2
nailed down(expression, adjective, set, certain)
2
never-failing(adjective, set, clear, strong, flat)
2
petrified(adjective, calm, quiet, strong, hard)
2
reliable(adjective, clear, strong, sound, tough)
2
solidified(adjective, set, hard, firm)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>