172 entries under tough topic. ×

6
indefatigable(adjective, strong, fit, lively)
6
potent(adjective, strong, great, sound, strength)
6
resistant(adjective, strong, fit, healthy)
6
sinewy(adjective, strong, sound, solid)
5
active(adjective, good, clear, strong, sound)
5
burly(adjective, strong)
5
enduring(adjective, strong, sound, fit)
5
lively(adjective, good, clear, strong)
5
red-blooded(adjective, strong, intense, energetic)
5
unafraid(adjective, strong, fear, bold)
4
able(adjective, strong, sound, fit)
4
chipper(adjective, good, clear, strong, great)
4
dashing(adjective, strong, energetic, powerful)
4
in fine fettle(expression, adjective, idiom, strong)
4
lionhearted(strong, bold, resolute, spirited)
4
persistent(determined, resolute, sturdy, hard-wearing)
4
resilient(adjective, strong, sturdy, flexible)
4
stable(adjective, strong, sound, solid)
4
unflagging(adjective, strong, fit, lively)
4
well-built(adjective, person, body, strong, sound)
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APASmart Define. (2016). hardy thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hardy/thesaurus/synonyms
ChicagoSmart Define. 2016. "hardy thesaurus" https://smartdefine.org/hardy/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, hardy thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hardy/thesaurus/synonyms>.
MLASmart Define. "hardy thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/hardy/thesaurus/synonyms>