52 entries under stable topic. ×

5
perennial(adjective, constant, stability, enduring)
4
long-lasting(adjective, constant, enduring, lasting)
4
set(adjective, calm, strong, secure, firm)
3
continual(adjective, steady, regular, fixed)
3
equable(adjective, calm, strong, secure, firm)
3
unfluctuating(adjective, calm, strong, secure, firm)
2
homogeneous(adjective, dull, steady, regular)
2
of a piece(expression, adjective, idiom, steady)
2
perduring(constant, enduring, lasting, perpetual)
2
regular(adjective, dull, set, steady)
2
unbroken(adjective, dull, steady, regular)
2
unfading(fixed, constant, enduring, lasting)
2
uninterrupted(adjective, dull, steady, regular)
1
connected(adjective, dull, steady, regular)
1
diurnal(constant, enduring, lasting, perpetual)
1
for keeps(expression, constant, enduring, lasting)
1
forever(constant, enduring, lasting, permanent)
1
forever and a day(expression, constant, enduring, lasting)
1
habitual(adjective, dull, steady, regular)
1
imperishable(adjective, fixed, constant, enduring)
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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>