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

202 entries under adjective topic. ×

2
consonant(even, rigid, inflexible, reliable)
2
continuous(persistent, constant, endless, indefinite)
2
decided
2
endless(persistent, continuous, relentless, enduring)
2
hard and fast
2
homogeneous(dull, steady, stable, regular)
2
immortal
2
indefatigable
2
infinite
2
irretrievable
2
level(even, rigid, inflexible, reliable)
2
long-lived
2
monolithic(even, rigid, inflexible, reliable)
2
of a piece(expression, idiom, steady, stable)
2
ordered(even, rigid, inflexible, reliable)
2
orderly(even, rigid, inflexible, reliable)
2
perseverant
2
pertinacious
2
regular(dull, set, steady, stable)
2
relentless(set, strong, hard, 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>