Synonyms|541Antonyms|146|Broader|5Narrower|8Related|402

353 entries under adjective topic. ×

7
uniform(calm, set, strong, secure)
6
abiding(calm, strong, secure, flat)
6
consistent(set, strong, certain, regular)
6
continuing(fixed, constant, continuous, steadfast)
6
definite(strong, flat, certain, determined)
6
dogged(set, hard, stiff, resolute)
6
durable(calm, strong, secure, firm)
6
eternal(fixed, static, dogmatic)
6
even(calm, strong, secure, firm)
6
final
6
perpetual(set, regular, fixed, rigid)
6
solid(calm, strong, secure, firm)
6
strong(calm, solid, substantial, constant)
6
unmodifiable(secure, certain, steady, limited)
6
unvaried
5
decided(clear, certain, limited, definite)
5
flat(strong, certain, definite, continuous)
5
implacable(hard, resolute, rigid, inflexible)
5
intractable(set, hard, stiff, rigid)
5
level(certain, limited, definite, inflexible)
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ChicagoSmart Define. 2015. "unchangeable thesaurus" https://smartdefine.org/unchangeable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unchangeable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unchangeable/thesaurus/synonyms>.
MLASmart Define. "unchangeable thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/unchangeable/thesaurus/synonyms>