Synonyms|131Antonyms|64|Broader|0Narrower|0Related|90
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platinum
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prearranged(inflexible, intent, hard-and-fast)
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precise(inflexible, intent, hard-and-fast)
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realistic
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resolute established(expression, inflexible, intent, hard-and-fast)
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resolved(inflexible, intent, hard-and-fast)
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restricted(inflexible, intent, hard-and-fast)
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rigged(inflexible, intent, hard-and-fast)
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rock-solid(adjective, sound)
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set-up(inflexible, intent, hard-and-fast)
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sound
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stainless
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stated(inflexible, intent, hard-and-fast)
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stipulated(inflexible, intent, hard-and-fast)
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stove
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strict
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stringent
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sure(certain, definite, inflexible, intent, hard-and-fast)
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true
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unblinking(inflexible, intent, hard-and-fast)
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APASmart Define. (2015). cast-iron thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/cast-iron/thesaurus/synonyms
ChicagoSmart Define. 2015. "cast-iron thesaurus" https://smartdefine.org/cast-iron/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, cast-iron thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/cast-iron/thesaurus/synonyms>.
MLASmart Define. "cast-iron thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/cast-iron/thesaurus/synonyms>