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

76 entries under even topic. ×

6
undeviating(adjective, constant, rigid, inflexible)
5
unmodifiable(adjective, set, secure, steady, fixed)
4
set(adjective, calm, strong, secure, firm)
3
equable(adjective, calm, strong, secure, firm)
3
long-standing(steady, unchanging)
3
methodical(adjective, rigid, inflexible, reliable)
3
strong(calm, firm, steady, fixed)
3
unfluctuating(adjective, calm, strong, secure, firm)
2
balanced(calm, strong, solid, steady, substantial)
2
consonant(adjective, rigid, inflexible, reliable)
2
homogeneous(adjective, dull, steady, stable, regular)
2
level(adjective, rigid, inflexible, reliable)
2
monolithic(adjective, rigid, inflexible, reliable)
2
of a piece(expression, adjective, idiom, steady, stable)
2
ordered(adjective, rigid, inflexible, reliable)
2
orderly(adjective, rigid, inflexible, reliable)
2
regular(adjective, dull, set, steady, stable)
2
smooth(adjective, unchanging, unbroken, undeviating)
2
solid(calm, strong, steady, fixed)
2
static(adjective, set, regular, fixed)
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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>