Synonyms|468Antonyms|98|Broader|6Narrower|0Related|413
3
unshakable
3
unswerving
2
absolute
2
adamantine(hard, resolute, rigid, inflexible, strict)
2
aged
2
balanced(calm, strong, solid, steady, substantial)
2
bold
2
ceaseless(adjective, persistent, constant, continuous, endless)
2
chronic(adjective, persistent, continuous, endless, relentless)
2
consonant(adjective, even, rigid, inflexible, reliable)
2
continuing(fixed, static, unvarying, unchangeable, unalterable)
2
continuous(adjective, persistent, constant, endless, indefinite)
2
decided
2
definite
2
diuturnal
2
endless(adjective, persistent, continuous, relentless, enduring)
2
faithful
2
good
2
hard and fast
2
homogeneous(adjective, dull, steady, stable, regular)
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APASmart Define. (2015). immutable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/immutable/thesaurus/synonyms
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>