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

88 entries under constant topic. ×

9
unvarying(adjective, calm, strong, secure, firm)
8
consistent(adjective, dull, steady, stable, regular)
8
even(adjective, calm, strong, secure, firm)
8
resolute(adjective, calm, strong, hard, determined)
8
rigid(adjective, set, hard, regular, fixed)
7
unwavering(adjective, calm, set, strong, solid)
6
durable(adjective, calm, strong, solid, steady)
6
undeviating(adjective, even, rigid, inflexible)
5
perennial(adjective, stable, stability, enduring)
5
unending(adjective, persistent, continuous, endless)
5
unmodifiable(adjective, set, secure, steady, fixed)
4
fast(adjective, calm, strong, solid, fixed)
4
long-lasting(adjective, stable, enduring, lasting)
4
set(adjective, calm, strong, secure, firm)
4
tough(adjective, calm, strong, rough, solid)
3
continual(adjective, steady, stable, regular, fixed)
3
equable(adjective, calm, strong, secure, firm)
3
secure(calm, strong, steady, substantial, fixed)
3
strong(calm, firm, steady, fixed, even)
3
unfluctuating(adjective, calm, strong, secure, firm)
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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>