101 entries under fixed topic. ×

18
unwavering(adjective, strong, secure, flat, firm)
17
unchangeable(adjective, strong, secure, moderate, flat)
16
resolved(adjective, strong, severe, flat, firm)
15
pigheaded(adjective, mean, hard, firm, deliberate)
13
headstrong(adjective, strong, hard, tough, rough)
13
unalterable(adjective, set, strong, hard, secure)
12
persistent(adjective, strong, tough, flat, firm)
12
refractory(adjective, hard, tough, rough, firm)
12
set in stone(expression, adjective, idiom, mean, hard)
12
solid(adjective, strong, hard, secure, smooth)
10
hardened(adjective, person, hard, tough, firm)
10
immutable(adjective, set, hard, secure, rough)
10
invariable(adjective, smooth, solid, level, true)
9
opinionated(adjective, firm, determined, unreasonable)
9
perverse(adjective, mean, hard, firm, deliberate)
8
unchanging(adjective, moderate, severe, firm, harsh)
7
indomitable(adjective, set, strong, hard, tough)
7
intolerant(adjective, set, severe, rigid)
7
recalcitrant(adjective, tough, firm, unreasonable)
6
constant(adjective, strong, secure, moderate, flat)
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APASmart Define. (2016). inflexible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms
ChicagoSmart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, inflexible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>.
MLASmart Define. "inflexible thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms>