98 entries under firm topic. ×

8
purposeful(adjective, feature, characteristic, strong, tough)
8
stiff-necked(adjective, mean, hard, tough)
8
unflinching(adjective, strong, harsh, energetic)
7
implacable(adjective, appearance, mean, hard, tough)
7
opinionated(adjective, tough, determined, resolute)
7
self-willed(adjective, tough, determined, resolute)
7
unfailing(adjective, strong, determined, steady)
6
adamantine(adjective, tough, determined, resolute)
6
devoted(adjective, strong, determined, steady)
6
loyal(adjective, strong, determined, bold)
6
refractory(adjective, tough, determined, unreasonable)
6
unshakable(adjective, mean, strong, hard, tough)
5
faithful(adjective, strong, determined, bold)
5
strong(adjective, tough, energetic, determined)
5
tough(adjective, mean, strong, hard)
5
undeviating(adjective, harsh, solid, cruel)
4
immutable(adjective, set, strong, hard)
4
patient(adjective, strong, energetic, determined)
4
recalcitrant(adjective, tough, unreasonable, grim)
4
unwearied(adjective, strong, energetic, determined)
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APASmart Define. (2015). dogged thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/dogged/thesaurus/synonyms
ChicagoSmart Define. 2015. "dogged thesaurus" https://smartdefine.org/dogged/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, dogged thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/dogged/thesaurus/synonyms>.
MLASmart Define. "dogged thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/dogged/thesaurus/synonyms>