Synonyms|119Antonyms|38|Broader|0Narrower|0Related|84
4
inflexible(adjective, hard, strict, obstinate, stubborn)
4
set(adjective, hard, stiff, resolute, rigid)
4
strict(adjective, hard, rigid, inflexible, obstinate)
3
absolute(adjective, strict)
3
binding(adjective, strict)
3
compulsory(adjective, strict)
3
conclusive(adjective, strict)
3
decisive(adjective, strict)
3
final(adjective, strict)
3
irrevocable(adjective, strict)
3
mandatory(adjective, strict)
2
certain(inflexible, intent)
2
exacting(adjective, strict)
2
inalterable(adjective, hard, inflexible, intent, unalterable)
2
must
2
unbending(adjective, hard, rigid, inflexible, strict)
2
unchangeable(adjective, set, hard, certain, stiff)
1
decretory
1
determinate(inflexible, intent)
1
dogged(adjective, set, hard, stiff, rigid)
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APASmart Define. (2015). hard-and-fast thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hard-and-fast/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-and-fast thesaurus" https://smartdefine.org/hard-and-fast/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, hard-and-fast thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hard-and-fast/thesaurus/synonyms>.
MLASmart Define. "hard-and-fast thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/hard-and-fast/thesaurus/synonyms>