108 entries under stiff topic. ×

95
firm(adjective, set, mean, clear, strong)
83
rigid(adjective, mean, strong, hard, tough)
80
inflexible(adjective, mean, strong, hard, secure)
63
hard(adjective, mean, strong, tough, easy)
60
determined(adjective, clear, strong, hard, tough)
59
unbending(adjective, mean, clear, strong, hard)
50
resolute(adjective, appearance, clear, strong, hard)
48
steadfast(adjective, clear, strong, secure, tough)
48
strong(adjective, set, hard, sound, tough)
39
stable(adjective, strong, hard, sound, secure)
38
sound(adjective, strong, hard, tough, strain)
33
fixed(adjective, mean, strong, hard, sound)
31
set(adjective, strong, hard, secure, tough)
29
steady(adjective, strong, sound, secure, tough)
28
tough(adjective, mean, clear, strong, hard)
28
adamantine(adjective, strong, hard, tough, firm)
25
tight(adjective, close, strong, hard, tough)
24
tenacious(adjective, clear, strong, sound, tough)
22
durable(adjective, strong, sound, tough, strain)
21
enduring(adjective, strong, sound, tough, strain)
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APASmart Define. (2016). unyielding thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unyielding/thesaurus/synonyms
ChicagoSmart Define. 2016. "unyielding thesaurus" https://smartdefine.org/unyielding/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unyielding thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unyielding/thesaurus/synonyms>.
MLASmart Define. "unyielding thesaurus" 10 March 2016. Web. 28 September 2026. <https://smartdefine.org/unyielding/thesaurus/synonyms>