64 entries under strong topic. ×

6
unflagging(adjective, firm, energetic, determined)
6
unswerving(adjective, tough, firm, determined)
5
staunch(adjective, tough, firm, determined)
5
unfailing(adjective, firm, determined, steady)
4
constant(adjective, firm, determined, active)
4
indomitable(adjective, tough, firm, difficult)
4
patient(adjective, firm, energetic, determined)
3
plodding(adjective, firm, determined, steady)
3
steady(adjective, firm, determined, resolute)
3
unflinching(adjective, firm, energetic, determined)
3
unremitting(adjective, firm, energetic, determined)
2
continuing(adjective, firm, determined, steady)
2
plugging(adjective, firm, determined, active)
2
unwearied(adjective, firm, energetic, determined)
1
continued(adjective, firm, determined, steady)
1
eager beaver(expression, adjective, firm, determined)
1
fireball(adjective, firm, determined, steady)
1
go-go(adjective, firm, determined, steady)
1
grind(adjective, firm, determined, active)
1
incessant(adjective, firm, determined, steady)
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APASmart Define. (2015). pertinacious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/pertinacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "pertinacious thesaurus" https://smartdefine.org/pertinacious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, pertinacious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/pertinacious/thesaurus/synonyms>.
MLASmart Define. "pertinacious thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/pertinacious/thesaurus/synonyms>