Synonyms|251Antonyms|39|Broader|2Narrower|0Related|383

31 entries under strict topic. ×

5
rigorous(adjective, set, strong, hard, tough)
2
immutable(hard, resolute, rigid, inflexible)
2
unadaptable(hard, resolute, rigid, inflexible)
2
unchangeable(hard, resolute, rigid, inflexible)
1
dyed-in-the-wool(adjective, set, strong, hard, tough)
1
indomitable(adjective, set, strong, hard, tough)
1
single-minded(tough, firm, cruel, stiff)
1
staunch(hard, resolute, rigid, inflexible)
1
stringent(adjective, hard, severe, stiff, resolute)
0
hard-and-fast(hard, resolute, rigid, inflexible)
0
unswayable(hard, resolute, rigid, inflexible)
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APASmart Define. (2015). adamantine thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/adamantine/thesaurus/synonyms
ChicagoSmart Define. 2015. "adamantine thesaurus" https://smartdefine.org/adamantine/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, adamantine thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/adamantine/thesaurus/synonyms>.
MLASmart Define. "adamantine thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/adamantine/thesaurus/synonyms>