300 entries under adjective topic. ×

8
strong-willed(strong, tough, firm, determined)
8
unyielding(strong, tough, flat, firm)
7
bold(resolute, tenacious)
7
decided(strong, firm, resolution, serious)
7
faithful(strong, firm, determined, bold)
7
headstrong(tough, firm, unreasonable, grim)
7
indomitable(strong, firm, determined, steady)
7
inflexible(strong, tough, flat, firm)
7
obdurate(strong, tough, flat, firm)
7
unrelenting
6
abiding(verb, set, strong, flat)
6
adamant(strong, tough, flat, firm)
6
fixed(strong, tough, flat, firm)
6
inexorable(tough, firm, determined, unreasonable)
6
rigid(tough, firm, determined, unreasonable)
6
uncompromising
6
undaunted
6
undeviating(strong, certain, definite, perseverance)
5
brave(determined, resolution, resolute, courageous)
5
bullheaded(tough, firm, determined, unreasonable)
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APASmart Define. (2015). persevering thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/persevering/thesaurus/synonyms
ChicagoSmart Define. 2015. "persevering thesaurus" https://smartdefine.org/persevering/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, persevering thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/persevering/thesaurus/synonyms>.
MLASmart Define. "persevering thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/persevering/thesaurus/synonyms>