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

202 entries under adjective topic. ×

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irreparable
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irrepealable
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mulish
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never-ending
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neverending(persistent, continuous, endless, relentless)
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non-breakable
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non-perishable
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normal(even, rigid, inflexible, reliable)
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not undoable
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ossified(even, rigid, inflexible, reliable)
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plumb(even, rigid, inflexible, reliable)
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purposive
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shatter-proof
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stony
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symmetrical(even, reliable, unchanging, orderly)
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unaccommodating
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unassailable
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unbreakable
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unhesitant
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unrecallable
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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>