127 entries under firm topic. ×

5
strengthen(verb, dull, close, set, fix)
5
unbending(adjective, mean, hard, determined)
5
vitrify(verb, close, set, fix, settle)
4
acclimatize(verb, dull, close, set, develop)
4
calcify(verb, close, set, fix, settle)
4
consolidate(verb, close, set, fix, settle)
4
dry(verb, close, set, fix, settle)
4
fortify(verb, close, set, fix, settle)
3
acclimate(verb, dull, close, set, develop)
3
adamantine(adjective, set, determined, stiff)
3
anneal(verb, close, set, fix, settle)
3
fossilize(verb, close, set, fix, settle)
3
incompliant(adjective, solid, determined, resolute)
3
iron(adjective, set, mean, hard)
3
season(verb, dull, close, set, develop)
3
stiff(adjective, set, strong, hard)
2
amalgamate(verb, close, set, fix, settle)
2
bake(verb, close, set, fix, settle)
2
brace(verb, close, set, fix, settle)
2
buttress(verb, close, set, fix, settle)
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APASmart Define. (2015). indurate thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/indurate/thesaurus/synonyms
ChicagoSmart Define. 2015. "indurate thesaurus" https://smartdefine.org/indurate/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, indurate thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/indurate/thesaurus/synonyms>.
MLASmart Define. "indurate thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/indurate/thesaurus/synonyms>