242 entries under tough topic. ×

1
perdurable(calm, solid, steady, substantial)
1
pertinacious(adjective, firm, cold, determined)
1
physically fit(expression, fit, fresh, healthy)
1
pliable(adjective, hard, flexible, hardy)
1
purposeful(adjective, firm, determined, bold)
1
relentless(adjective, hard, severe, firm)
1
roaring(fit, healthy, well, hearty)
1
spartan(energetic, noble, bold, resolute)
1
steamroller(adjective, great, energetic, violent)
1
steel(adjective, hard, sturdy, rigid)
1
stouthearted(solid, determined, noble, bold)
1
strong as an ox(expression, adjective, idiom, great, sound)
1
supple(adjective, hard, weak, soft)
1
tiger(fit, vigorous, healthy, well)
1
venturous(noble, bold, resolute, spirited)
1
volatile(adjective, hard, weak, soft)
1
zappy(fit, healthy, well, hearty)
0
tough inflexible(expression, hard, sturdy, rigid)
0
airy(adjective, hard, flexible, hardy)
0
all right(expression, fit, fresh, well)
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APASmart Define. (2016). strong thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/strong/thesaurus/synonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 29 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms>