1,055 entry under adjective topic. ×

15
tenacious(strong, firm, determined, resolute)
15
troublesome(characteristic, severe, difficulty, difficult)
14
obstinate(mean, strong, hard, rough)
14
chewy(feature, characteristic, structure, sinewy)
14
exacting(dull, hard, easy, severe)
14
hard-boiled(noun, mean, strong, hard)
14
ruthless(strong, hard, severe, rough)
14
strict(strong, hard, easy, severe)
13
determined(clear, strong, hard, severe)
13
formidable(strong, severe, difficulty, rough)
13
glutinous(feature, characteristic, structure, viscous)
13
savage(hard, rough, harsh, violent)
13
strapping(person, body, strong, sound)
12
insensitive(noun, mean, hard, cool)
12
heavy(noun, good, person, dull)
12
husky(person, body, strong, fresh)
12
rocky(firm, stiff, rigid, troubled)
12
ropy(feature, characteristic, thin, vigorous)
12
sinewy(strong, sound, fit, thin)
12
sound(calm, strong, fit, firm)
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APASmart Define. (2016). tough thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tough/thesaurus/synonyms
ChicagoSmart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, tough thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>.
MLASmart Define. "tough thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms>