226 entries under solid topic. ×

2
stabile(adjective, dull, firm, still)
2
stark(adjective, strong, hard, sound, tough)
2
substantial(adjective, strong, hard, sound, tough)
2
taut(adjective, strong, hard, secure, rough)
2
tense(adjective, hard, firm, stiff)
2
thickened(adjective, set, strong, firm)
2
unflappable(adjective, dull, firm, certain)
2
unfluctuating(adjective, dull, strong, secure, firm)
2
unquestionable(adjective, set, clear, total)
2
unshaken(adjective, clear, strong, flat, firm)
1
able(adjective, set, strong, sound, tough)
1
able-bodied(adjective, strong, sound, tough)
1
absolutely certain(expression, adjective, set, certain)
1
active(adjective, strong, sound, tough)
1
annealed(adjective, hard, firm, stiff)
1
ardent(adjective, firm, true, stable)
1
arthritic(adjective, hard, firm, stiff)
1
athletic(adjective, strong, sound, tough)
1
benumbed(verb, adjective, hard, firm)
1
beyond doubt(expression, adjective, set, certain)
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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>