Synonyms|468Antonyms|98|Broader|6Narrower|0Related|413

61 entries under rigid topic. ×

4
unyielding(adjective, hard, firm, steady, fixed)
3
iron(adjective, set, hard, stiff)
3
methodical(adjective, even, inflexible, reliable)
3
single-minded(adjective, set, hard, stiff)
3
steely(adjective, set, hard, stiff)
2
adamantine(hard, resolute, inflexible, strict)
2
consonant(adjective, even, inflexible, reliable)
2
implacable(hard, resolute, inflexible, strict)
2
indomitable(hard, resolute, inflexible, strict)
2
inexorable(hard, resolute, inflexible, strict)
2
level(adjective, even, inflexible, reliable)
2
monolithic(adjective, even, inflexible, reliable)
2
ordered(adjective, even, inflexible, reliable)
2
orderly(adjective, even, inflexible, reliable)
2
regular(adjective, dull, set, steady, stable)
2
static(adjective, set, regular, fixed, even)
2
straight(adjective, even, inflexible, reliable)
2
strict(hard, inflexible, obstinate, stubborn)
2
systematic(adjective, even, inflexible, reliable)
2
unadaptable(adjective, set, hard, stiff)
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ChicagoSmart Define. 2015. "immutable thesaurus" https://smartdefine.org/immutable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, immutable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/immutable/thesaurus/synonyms>.
MLASmart Define. "immutable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/immutable/thesaurus/synonyms>