101 entries under fixed topic. ×

103
rigid(adjective, mean, strong, hard, tough)
96
stubborn(adjective, determined, resolute, uncompromising, obstinate)
87
unyielding(adjective, mean, strong, hard, secure)
81
uncompromising(adjective, mean, hard, secure, tough)
74
obdurate(adjective, person, strong, hard, secure)
67
resolute(adjective, strong, hard, secure, tough)
66
firm(noun, adjective, mean, strong, hard)
63
determined(adjective, strong, tough, flat, firm)
56
obstinate(adjective, mean, strong, hard, tough)
53
immovable(adjective, mean, strong, hard, secure)
52
adamant(adjective, person, mean, strong, hard)
51
relentless(adjective, mean, strong, hard, tough)
43
set(adjective, strong, hard, secure, tough)
38
unshakable(adjective, mean, strong, hard, secure)
33
hard(adjective, mean, strong, tough, severe)
32
steadfast(adjective, strong, secure, tough, flat)
23
intractable(adjective, strong, hard, tough, rough)
23
hard-nosed(adjective, mean, strong, hard, secure)
21
dogged(adjective, mean, strong, hard, tough)
21
mulish(adjective, mean, strong, hard, tough)
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APASmart Define. (2016). inflexible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms
ChicagoSmart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, inflexible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>.
MLASmart Define. "inflexible thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms>