1
desperate(adjective, hard, severe, rough, harsh)
1
destined(adjective, definite, absolute, obvious, expected)
1
determinate
1
doomed(fixed, expected, predictable, necessary, permanent)
1
dour
1
drastic(adjective, hard, severe, rough, harsh)
1
endless(adjective, persistent, continuous, relentless, continual)
1
established(state, establishment)
1
exact(strong, severe, certain, definite, stiff)
1
explicit(strong, certain, definite, distinct, absolute)
1
fated(adjective, certain, determined, definite, distinct)
1
fateful(adjective, certain, even, expected, predictable)
1
ferocious(adjective, hard, severe, rough, harsh)
1
fierce(adjective, hard, severe, rough, harsh)
1
fixed resistant(expression, calm, strong, solid, substantial)
1
flinty
1
for certain(expression, expected, predictable, necessary, inexorable)
1
foreordained(expected, predictable, necessary, inexorable, undeniable)
1
grim
1
habitual(adjective, dull, steady, stable, regular)
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APASmart Define. (2015). unalterable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unalterable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unalterable thesaurus" https://smartdefine.org/unalterable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unalterable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unalterable/thesaurus/synonyms>.
MLASmart Define. "unalterable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/unalterable/thesaurus/synonyms>