Synonyms|468Antonyms|98|Broader|6Narrower|0Related|413
1
diligent
1
diurnal(stable, constant, enduring, lasting, perpetual)
1
dour
1
drastic(adjective, hard, severe, rough, harsh)
1
equal
1
eternally the same(expression, idiom)
1
evergreen
1
fated(adjective, fixed, even, rigid, inflexible)
1
ferocious(adjective, hard, severe, rough, harsh)
1
fierce(adjective, hard, severe, rough, harsh)
1
fixed resistant(expression, calm, strong, solid, substantial)
1
flat
1
flinty
1
for keeps(expression, stable, constant, enduring, lasting)
1
forever(stable, constant, enduring, lasting, permanent)
1
forever and a day(expression, stable, constant, enduring, lasting)
1
frozen
1
glorious
1
grim
1
habitual(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>