83 entries under rigid topic. ×

18
tough(adjective, strong, hard, firm, serious)
16
unyielding(adjective, strong, hard, tough, firm)
15
flinty(adjective, strong, hard, tough, firm)
15
inflexible(adjective, strong, hard, tough, firm)
14
adamantine(adjective, strong, hard, tough, firm)
14
hard(adjective, strong, tough, firm, solid)
14
stony(adjective, hard, firm, solid, hostile)
13
obdurate(adjective, strong, hard, tough, cold)
12
firm(adjective, strong, hard, tough, solid)
12
unbending(adjective, strong, hard, tough, firm)
10
adamant(adjective, strong, hard, tough, resolute)
10
inexorable(adjective, strong, hard, tough, determined)
10
stiff(adjective, set, hard, firm, dead)
9
unrelenting(adjective, strong, hard, tough, determined)
8
determined(adjective, strong, hard, tough, resolute)
6
immovable(adjective, strong, hard, tough, determined)
6
impenetrable(adjective, firm, unyielding)
6
set(adjective, hard, firm, solid, resolute)
5
indestructible(adjective, firm, unyielding)
5
indurate(adjective, hard, firm, solid, stiff)
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APASmart Define. (2015). steely thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/steely/thesaurus/synonyms
ChicagoSmart Define. 2015. "steely thesaurus" https://smartdefine.org/steely/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, steely thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/steely/thesaurus/synonyms>.
MLASmart Define. "steely thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/steely/thesaurus/synonyms>