202 entries under adjective topic. ×

1
desperate(hard, severe, rough, harsh)
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devoted
1
drastic(hard, severe, rough, harsh)
1
fated(fixed, even, rigid, inflexible)
1
ferocious(hard, severe, rough, harsh)
1
fierce(hard, severe, rough, harsh)
1
habitual(dull, steady, stable, regular)
1
hard-and-fast(set, hard, stiff, rigid)
1
imperishable(stable, fixed, constant, enduring)
1
incessant(persistent, constant, continuous, endless)
1
inevitable
1
interminable(persistent, constant, continuous, endless)
1
like the Rock of Gibralter(expression, idiom, steady, stable)
1
monochrome(dull, steady, stable, regular)
1
monophonic(dull, steady, stable, regular)
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monotonous(dull, set, steady, stable)
1
narrow(hard, severe, rough, harsh)
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nonstop(dull, steady, stable, regular)
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obdurate(hard, steady, fixed, rigid)
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pigheaded(obstinate, stubborn, unbending)
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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>