139 entries under determined topic. ×

6
fixed(adjective, tough, firm, resolute)
6
immovable(adjective, difficult, resolute, obstinate)
6
self-willed(adjective, tough, firm, difficult)
6
set(adjective, resolute, obstinate, uncompromising)
6
unbending(adjective, tough, resolute, obstinate)
6
unflagging(adjective, strong, firm, energetic)
6
unswerving(adjective, strong, tough, firm)
5
bull-headed(adjective, resolute, obstinate, stubborn)
5
inexorable(adjective, tough, resolute, obstinate)
5
pat(adjective, difficult, resolute, obstinate)
5
staunch(adjective, strong, tough, firm)
5
stiff(adjective, resolute, persistent, obstinate)
5
unbendable(adjective, resolute, obstinate, uncompromising)
5
unfailing(adjective, strong, firm, steady)
5
wilful(adjective, resolute, uncompromising, unshakeable)
4
adamantine(adjective, resolute, uncompromising, unshakeable)
4
bovine(adjective, resolute, obstinate, uncompromising)
4
constant(adjective, strong, firm, active)
4
hard(adjective, sharp, resolute, stubborn)
4
indomitable(adjective, strong, tough, firm, difficult)
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APASmart Define. (2015). pertinacious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/pertinacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "pertinacious thesaurus" https://smartdefine.org/pertinacious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, pertinacious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/pertinacious/thesaurus/synonyms>.
MLASmart Define. "pertinacious thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/pertinacious/thesaurus/synonyms>