166 entries under tough topic. ×

4
strenuous(adjective, strong, intense, energetic)
4
whole(adjective, health, strong, great, sound)
4
zippy(adjective, strong, fit, energetic)
3
adamantine(adjective, strong, hard, strength)
3
built(adjective, strong, fit, healthy)
3
chipper(adjective, strong, great, right)
3
hale and hearty(expression, adjective, idiom, strong)
3
inflexible(adjective, strong, hard, solid)
3
live(adjective, strong, fit, healthy)
3
normal(strong, fit, fresh, well)
3
robustious(adjective, strong, fit, healthy)
3
robustuous(adjective, strong, fit, healthy)
3
secure(verb, adjective, strong, sound)
2
all right(expression, strong, fit, fresh)
2
austere(adjective, strong, hard, sturdy)
2
dense(adjective, person, body, strong, hard)
2
determined(adjective, strong, hard, solid)
2
effective(adjective, strong, hard, sharp)
2
efficient(adjective, strong, intense, energetic)
2
enterprising(adjective, strong, intense, energetic)
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APASmart Define. (2016). robust thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/robust/thesaurus/synonyms
ChicagoSmart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, robust thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>.
MLASmart Define. "robust thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms>