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

72 entries under unchanging topic. ×

8
even(adjective, calm, strong, secure, firm)
8
rigid(adjective, set, hard, regular, fixed)
7
irreversible(adjective, fixed, even, rigid, inflexible)
6
undeviating(adjective, even, constant, rigid, inflexible)
5
unmodifiable(adjective, set, secure, steady, fixed)
4
set(adjective, calm, strong, secure, firm)
3
ageless(adjective, fixed, lasting, permanent)
3
equable(adjective, calm, strong, secure, firm)
3
long-standing(steady, even)
3
methodical(adjective, even, rigid, inflexible, reliable)
3
unfluctuating(adjective, calm, strong, secure, firm)
2
consonant(adjective, even, rigid, inflexible, reliable)
2
homogeneous(adjective, dull, steady, stable, regular)
2
level(adjective, even, rigid, inflexible, reliable)
2
monolithic(adjective, even, rigid, inflexible, reliable)
2
of a piece(expression, adjective, idiom, steady, stable)
2
ordered(adjective, even, rigid, inflexible, reliable)
2
orderly(adjective, even, rigid, inflexible, reliable)
2
regular(adjective, dull, set, steady, stable)
2
smooth(adjective, even, unbroken, undeviating)
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ChicagoSmart Define. 2015. "immutable thesaurus" https://smartdefine.org/immutable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, immutable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/immutable/thesaurus/synonyms>.
MLASmart Define. "immutable thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/immutable/thesaurus/synonyms>