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6
lively(adjective, strong, tough, fit, energetic)
6
peppy(adjective, strong, tough, fit, energetic)
6
red-blooded(adjective, strong, tough, intense, energetic)
6
flourishing(adjective, strong, great, sound, tough)
6
forcible(adjective, strong, sound, strength, tough)
6
spry(adjective, strong, lively, vigorous)
5
fresh(health, strong, great, tough, right)
5
mettlesome(adjective, strong, tough, intense, energetic)
4
animated(adjective, strong, enthusiastic, vigorous)
4
bouncing(adjective, strong, tough, intense, energetic)
4
brisk(adjective, strong, tough, intense, energetic)
4
enthusiastic(adjective, vigorous, sincere, animated)
4
intense(adjective, strong, great, tough, energetic)
4
snappy(adjective, strong, tough, fit, energetic)
4
spirited(adjective, strong, tough, energetic, powerful)
4
strenuous(adjective, strong, tough, intense, energetic)
4
vivacious(adjective, enthusiastic, lively, vigorous)
4
zippy(adjective, strong, tough, fit, energetic)
3
sprightly(adjective, strong, lively, vigorous)
2
aggressive(peppy, bouncing)
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APASmart Define. (2016). robust thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/robust/thesaurus/synonyms
ChicagoSmart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, robust thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>.
MLASmart Define. "robust thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms>