Synonyms|330Antonyms|5|Broader|3Narrower|0Related|149
1
customary(adjective, firm, determined, usual, regular)
1
decided(adjective, firm, determined, usual, regular)
1
decisive(adjective, firm, determined, usual, regular)
1
defended
1
defending
1
defensive
1
demanding(adjective, severe, harsh, stiff, rigid)
1
dermal
1
dermatoid
1
destroyer
1
determined(adjective, set, hard, firm, usual)
1
diligent
1
dogged
1
donnish(adjective, character, behavior, pedant)
1
double-checked(set, certain, unquestionable, indisputable, unassailable)
1
dour
1
drawing(adjective, severe, harsh, stiff, rigid)
1
dreadnought
1
dyed-in-the-wool(adjective, set, hard, severe, harsh)
1
enduring(adjective, fixed, rigid)
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APASmart Define. (2015). ironclad thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/ironclad/thesaurus/synonyms
ChicagoSmart Define. 2015. "ironclad thesaurus" https://smartdefine.org/ironclad/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, ironclad thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/ironclad/thesaurus/synonyms>.
MLASmart Define. "ironclad thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/ironclad/thesaurus/synonyms>