Synonyms|541Antonyms|146|Broader|5Narrower|8Related|402

68 entries under firm topic. ×

6
even(adjective, calm, strong, secure)
6
solid(adjective, calm, strong, secure)
5
regular(adjective, set, solid, stable)
5
reliable(adjective, calm, strong, secure)
5
unqualified(adjective, strong, flat, solid)
4
certain(adjective, clear, solid, determined)
4
settled(adjective, strong, flat, solid)
3
loyal(adjective, solid, stable, fixed)
3
sturdy(adjective, calm, strong, secure)
2
balanced(adjective, calm, strong, secure)
2
equable(adjective, calm, strong, secure)
2
fast(adjective, calm, strong, secure)
2
secure(adjective, calm, strong, solid)
2
single-minded(adjective, set, hard, solid)
2
unfaltering(adjective, clear, solid, certain)
2
unfluctuating(adjective, calm, strong, secure)
2
unshaken(adjective, set, clear, strong, flat)
2
unswerving(adjective, solid, stable, fixed)
1
brick-wall(adjective, calm, strong, secure)
1
calm(adjective, strong, secure, solid)
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ChicagoSmart Define. 2015. "unchangeable thesaurus" https://smartdefine.org/unchangeable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unchangeable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unchangeable/thesaurus/synonyms>.
MLASmart Define. "unchangeable thesaurus" 3 August 2015. Web. 26 September 2026. <https://smartdefine.org/unchangeable/thesaurus/synonyms>