127 entries under tough topic. ×

4
masterful(adjective, smart, energetic, powerful)
4
robustious(adjective, strong, fit, healthy)
4
thriving(adjective, strong, fit, healthy)
3
unflagging(adjective, strong, sound, fit)
3
unyielding(adjective, strong, hard, sound)
2
able(adjective, strong, sound, sharp)
2
booming(strong, fit, healthy, well)
2
bright-eyed(adjective, good, clear, strong, great)
2
bushy-tailed(adjective, good, clear, strong, great)
2
full of life(expression, adjective, idiom, strong)
2
hard as nails(expression, adjective, idiom, strong, hard)
2
heavy(adjective, strong, sound, severe)
2
nervy(adjective, smart, energetic, determined)
2
normal(strong, fit, clean, pure)
2
powerhouse(adjective, strong, great, solid)
2
prospering(strong, fit, healthy, well)
2
robustuous(strong, fit, healthy, well)
2
rosy-cheeked(adjective, person, strong, fit)
2
rough(strong, fit, healthy, well)
2
steady(adjective, strong, sound, solid)
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APASmart Define. (2016). vigorous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/vigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "vigorous thesaurus" https://smartdefine.org/vigorous/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, vigorous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/vigorous/thesaurus/synonyms>.
MLASmart Define. "vigorous thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/vigorous/thesaurus/synonyms>