103 entries under strong topic. ×

1
grind(adjective, firm, energetic, determined)
1
hale(fit, healthy, well, robust)
1
hardy(adjective, tough, fit, lively)
1
high-powered(adjective, moving, lively, active)
1
lusty(adjective, sound, tough, fit)
1
muscular(fit, healthy, well, robust)
1
peppy(adjective, tough, fit, lively)
1
potent(adjective, tough, fit, lively)
1
powerful(adjective, sound, tough, fit)
1
red-blooded(adjective, moving, lively, active)
1
robust(fit, active, healthy, well)
1
snappy(adjective, tough, fit, lively)
1
solid(complete, fit, firm, certain)
1
sprightly(adjective, moving, lively, active)
1
spry(adjective, moving, lively, active)
1
sturdy(adjective, sound, tough, fit)
1
undeterred(adjective, firm, determined, steady)
1
unstinted(adjective, firm, determined, steady)
1
vivacious(adjective, moving, lively, active)
1
zippy(adjective, tough, fit, lively)
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APASmart Define. (2015). unflagging thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unflagging thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>.
MLASmart Define. "unflagging thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms>