48 entries under determined topic. ×

7
industrious(adjective, strong, difficult, energetic, lively)
7
unflinching(adjective, set, strong, firm, energetic)
6
indomitable(adjective, strong, firm, steady)
6
pertinacious(adjective, strong, firm, energetic)
5
devoted(adjective, strong, firm, steady)
5
true(adjective, strong, firm, certain)
4
dedicated(adjective, strong, firm, solid, intense)
4
patient(adjective, strong, firm, energetic)
4
strong(adjective, sound, tough, fit, firm)
4
vigorous(adjective, strong, sound, tough, fit)
3
active(adjective, strong, difficult, energetic, lively)
3
unceasing(adjective, strong, firm, steady)
3
unshaken(adjective, strong, firm, solid)
2
continuing(adjective, strong, firm, certain)
2
incessant(adjective, strong, firm, steady)
2
plodding(adjective, strong, firm, steady)
2
plugging(adjective, strong, firm, active)
2
strenuous(adjective, strong, difficult, energetic, lively)
1
ball of fire(expression, adjective, idiom, strong, lively)
1
continued(adjective, strong, complete, firm, total)
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APASmart Define. (2015). unflagging thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, unflagging thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>.
MLASmart Define. "unflagging thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms>