100 entries under firm topic. ×

25
resolute(adjective, strong, tough, keen, flat)
25
steadfast(adjective, strong, tough, flat)
23
persistent(adjective, quiet, understanding, strong, tough)
22
dogged(adjective, strong, tough, ready)
21
determined(adjective, strong, tough, keen, flat)
19
indefatigable(adjective, strong, difficult, determined)
19
tireless(adjective, strong, difficult, energetic)
18
tenacious(adjective, strong, tough, flat)
17
steady(adjective, strong, flat, determined)
17
stubborn(adjective, characteristic, quality, strong, tough)
17
unflagging(adjective, strong, difficult, energetic)
16
unwavering(adjective, strong, flat, certain)
15
constant(adjective, strong, flat, certain)
14
unfaltering(adjective, strong, determined, steady)
13
obstinate(adjective, strong, tough, determined)
11
unswerving(adjective, set, strong, tough)
10
resolved(adjective, strong, flat, certain)
10
loyal(adjective, strong, determined, bold)
10
relentless(adjective, strong, tough, determined)
10
unflinching(adjective, strong, flat, certain)
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APASmart Define. (2015). persevering thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/persevering/thesaurus/synonyms
ChicagoSmart Define. 2015. "persevering thesaurus" https://smartdefine.org/persevering/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, persevering thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/persevering/thesaurus/synonyms>.
MLASmart Define. "persevering thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/persevering/thesaurus/synonyms>