118 entries under determined topic. ×

13
merciless(adjective, appearance, mean, hard, tough)
12
stiff-necked(adjective, mean, strong, hard, tough)
12
tenacious(adjective, resolute, obstinate, uncompromising)
11
pertinacious(adjective, strong, tough, cold)
11
pitiless(adjective, animal, mean, hard, tough)
11
tough(adjective, mean, strong, hard, severe)
10
set in stone(expression, adjective, idiom, mean, hard)
10
steady(adjective, resolute, persistent, constant)
9
continual(adjective, certain, persistent, constant)
9
mulish(adjective, mean, strong, hard, tough)
9
steely(adjective, strong, hard, tough)
9
uncompliant(adjective, resist, resolute, obstinate)
8
endless(adjective, certain, persistent, constant)
8
hardheaded(adjective, strong, hard, tough, cold)
8
incompliant(adjective, resist, resolute, persistent)
8
pat(adjective, resolute, obstinate, uncompromising)
8
perpetual(adjective, steady, persistent, constant)
8
unswayable(adjective, resolute, rigid, obstinate)
7
brassbound(adjective, resist, resolute, persistent)
7
die-hard(adjective, resist, resolute, persistent)
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APASmart Define. (2015). unrelenting thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unrelenting/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrelenting thesaurus" https://smartdefine.org/unrelenting/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unrelenting thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unrelenting/thesaurus/synonyms>.
MLASmart Define. "unrelenting thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/unrelenting/thesaurus/synonyms>