Synonyms|374Antonyms|68|Broader|6Narrower|0Related|45

100 entries under strong topic. ×

3
tough(adjective, sound, fit, firm)
3
vital(adjective, tough, fit, lively)
2
aggressive(adjective, moving, lively, active)
2
animated(adjective, moving, lively, active)
2
brisk(adjective, moving, lively, active)
2
incessant(adjective, firm, determined, steady)
2
kinetic(adjective, moving, energetic, lively)
2
peppy(adjective, tough, fit, lively)
2
plugging(adjective, firm, determined, active)
2
sprightly(adjective, moving, lively, active)
2
zippy(adjective, tough, fit, lively)
1
ball of fire(expression, adjective, idiom, lively)
1
brawny(fit, healthy, well, robust)
1
breezy(adjective, moving, lively, active)
1
continued(adjective, firm, determined, steady)
1
demoniac(adjective, moving, lively, active)
1
eager beaver(expression, adjective, firm, determined)
1
fireball(adjective, firm, determined, steady)
1
forcible(adjective, moving, lively, active)
1
go-go(adjective, firm, determined, steady)
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APASmart Define. (2015). indefatigable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, indefatigable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>.
MLASmart Define. "indefatigable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms>