116 entries under tough topic. ×

72
stubborn(adjective, resolute, determined, uncompromising, obstinate)
71
inflexible(adjective, mean, strong, hard)
64
rigid(adjective, mean, strong, hard)
62
unyielding(adjective, mean, clear, strong, hard)
57
uncompromising(adjective, mean, clear, hard)
51
firm(adjective, mean, clear, strong, hard)
50
inexorable(adjective, mean, strong, hard)
50
obdurate(adjective, strong, hard, severe)
44
unrelenting(adjective, mean, strong, hard)
43
determined(adjective, clear, strong, hard)
43
resolute(adjective, clear, strong, hard)
41
relentless(adjective, mean, strong, hard)
36
immovable(adjective, mean, strong, hard)
30
adamant(adjective, mean, strong, hard)
25
obstinate(adjective, mean, hard, severe)
24
adamantine(adjective, strong, hard, resist)
23
unshakable(adjective, mean, strong, hard)
22
steadfast(adjective, clear, strong, severe)
20
implacable(adjective, mean, strong, hard)
20
unbendable(adjective, firm, resist, determined)
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APASmart Define. (2016). unbending thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unbending/thesaurus/synonyms
ChicagoSmart Define. 2016. "unbending thesaurus" https://smartdefine.org/unbending/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, unbending thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unbending/thesaurus/synonyms>.
MLASmart Define. "unbending thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/unbending/thesaurus/synonyms>