529 entries under adjective topic. ×

22
impregnable(strain, firmness, labour, hardiness)
22
lasting(strain, firmness, labour, hardiness)
22
pertinacious(tough, determined, resolute, obstinate)
21
headstrong(hard, tough, rough, harsh)
21
enduring(strong, sound, tough, strain)
21
implacable(appearance, mean, strong, hard)
21
unbendable(firm, resist, determined, unreasonable)
20
invariable(strain, firmness, labour, hardiness)
20
settled(strain, firmness, labour, hardiness)
20
stout(strong, sound, tough, strain)
19
fast(strong, secure, tough, strain)
19
long-standing(strain, firmness, labour, hardiness)
19
perpetual(strain, firmness, labour, hardiness)
19
proof(strain, firmness, labour, hardness)
19
robust(strong, hard, sound, tough)
19
stationary(strain, firmness, labour, hardiness)
19
substantial(strong, hard, sound, tough)
19
sustained(strain, firmness, labour, hardiness)
19
withstanding(strain, firmness, labour, hardiness)
18
hard-nosed(mean, clear, strong, hard)
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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>