455 entries under adjective topic. ×

8
bold(resolute, tenacious)
8
changeless(stable, resolute, constant, dedicated)
8
decided(firm, intense, deliberate, determined)
8
everlasting(continue, steady, stable, constant)
8
importunate(continue, demanding, insistent)
8
long-lasting(tough, continue, sturdy, constant)
8
long-lived(continue, continuous, hardened, lasting)
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non-stop
8
repetitive
8
strong-willed(strong, tough, firm, intense)
8
unbroken(severe, pure, steady, regular)
8
undaunted
7
adamant(strong, tough, flat, firm)
7
confirmed(usual, steady, regular, routine)
7
continued(strong, firm, determined, steady)
7
dedicated(strong, firm, determined, steady)
7
demanding(firm, obstinate, insistent, dogged)
7
haunting(lasting, remaining)
7
inexorable(tough, determined, unreasonable, grim)
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intent(strong, flat, intense, certain)
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APASmart Define. (2015). persistent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms
ChicagoSmart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, persistent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>.
MLASmart Define. "persistent thesaurus" 1 June 2015. Web. 21 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms>