150 entries under inflexible topic. ×

9
tough(adjective, mean, strong, hard, sound)
8
attached(adjective, secure, firm, true, constant)
8
unflinching(adjective, strong, flat, firm, certain)
7
planned(verb, adjective, set, certain, deliberate)
7
prearranged(adjective, set, certain, ordinary, usual)
7
unmovable(adjective, move, calm, quiet, certain)
6
persevering(adjective, strong, tough, flat, firm)
6
undeviating(adjective, strong, severe, flat, firm)
5
defined(verb, adjective, definite, positive)
5
definitive(adjective, intent, hard-and-fast)
5
hard(adjective, adverb, mean, strong, rough)
5
inalterable(adjective, set, hard, regular, rigid)
5
intractable(adjective, hard, tough, rough, firm)
5
irreversible(adjective, even, rigid, consistent)
5
resistant(adjective, strong, tough, firm, determined)
5
restricted(adjective, set, fine, thin, limited)
5
stuck(adjective, firm, true, still, steady)
5
unqualified(adjective, strong, complete, flat, firm)
4
agreed(adjective, set, firm, certain, determined)
4
cemented(noun, verb, adjective, strong, hard)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 27 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>