242 entries under tough topic. ×

4
unafraid(power, determined, noble, bold)
4
unbending(adjective, close, hard, flat)
4
undaunted(adjective, great, noble, bold)
4
unflagging(adjective, sound, fit, firm)
4
wicked(adjective, fit, informal, energetic)
3
abiding(calm, great, solid, powerful)
3
hard as nails(expression, adjective, idiom, hard, sound)
3
adamant(adjective, hard, flat, firm)
3
cohesive(adjective, close, hard, firm)
3
cool(adjective, good, great, bold)
3
driving(adjective, moving, severe, energetic)
3
hard-nosed(adjective, hard, determined, resolute)
3
in good shape(expression, adjective, idiom, person)
3
obdurate(adjective, hard, flat, firm)
3
robustuous(feature, force, fit, healthy)
3
seasoned(adjective, hard, sound, sharp)
3
true(adjective, good, sound, reasonable)
3
whole(adjective, health, sound, fit)
2
set(verb, adjective, calm, hard)
2
austere(adjective, hard, severe, cold)
10 years ago|100k views|share |citing 
APASmart Define. (2016). strong thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/strong/thesaurus/synonyms
ChicagoSmart Define. 2016. "strong thesaurus" https://smartdefine.org/strong/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, strong thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/strong/thesaurus/synonyms>.
MLASmart Define. "strong thesaurus" 1 April 2016. Web. 28 September 2026. <https://smartdefine.org/strong/thesaurus/synonyms>