80 entries under tough topic. ×

1
rough(strong, severe, fit, intense)
1
rugged(strong, fit, healthy, well)
1
sinewy(strong, fit, healthy, well)
1
snappy(strong, fit, healthy, well)
1
sound(adjective, strong, hard, fit)
1
stout(strong, fit, healthy, well)
1
strapping(strong, fit, healthy, well)
1
sturdy(adjective, strong, hard, solid)
1
thriving(strong, fit, healthy, well)
1
tiger(strong, fit, healthy, well)
1
vigorous(adjective, strong, fit, intense)
1
vital(strong, fit, healthy, well)
1
well(strong, fit, healthy)
1
wicked(strong, fit, healthy, well)
1
zappy(strong, fit, healthy, well)
1
zippy(strong, fit, healthy, well)
0
able(adjective, strong, fit, healthy)
0
capable(adjective, strong, fit, healthy)
0
fine-grained(hard, solid, rigid, inflexible)
0
refractory(hard, solid, rigid, inflexible)
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APASmart Define. (2015). concentrated thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/concentrated/thesaurus/synonyms
ChicagoSmart Define. 2015. "concentrated thesaurus" https://smartdefine.org/concentrated/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, concentrated thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/concentrated/thesaurus/synonyms>.
MLASmart Define. "concentrated thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/concentrated/thesaurus/synonyms>