50 entries under indefatigable topic. ×

1
grind(adjective, strong, firm, lively, determined)
1
incessant(adjective, strong, firm, determined, active)
1
inexhaustible(adjective, strong, firm, energetic, determined)
1
never-failing(adjective, set, strong, flat, firm)
1
sure(adjective, set, strong, tough, flat)
1
unqualified(adjective, set, strong, flat, firm)
1
unquestioning(adjective, set, firm, intense, resolute)
0
go-go(adjective, strong, firm, determined, steady)
0
undeterred(adjective, strong, firm, determined, steady)
0
unstinted(adjective, strong, firm, determined, steady)
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APASmart Define. (2015). persevering thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/persevering/thesaurus/synonyms
ChicagoSmart Define. 2015. "persevering thesaurus" https://smartdefine.org/persevering/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, persevering thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/persevering/thesaurus/synonyms>.
MLASmart Define. "persevering thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/persevering/thesaurus/synonyms>