205 entries under difficult topic. ×

5
labored(adjective, great, tough, rough)
5
puzzling(adjective, fancy, severe, property)
5
stormy(adjective, nature, severe, rough)
5
tall(adjective, easy, unreasonable, exaggerated)
5
tangled(adjective, complex, sophisticated, tense)
5
tedious(adjective, dull, tender, boring)
5
wicked(adjective, mean, tough, severe, evil)
4
Herculean(adjective, strong, powerful, awkward)
4
indomitable(adjective, set, strong, great, tough)
4
recondite(adjective, fancy, obscure, intense)
4
scabrous(adjective, awkward, demanding, grueling)
4
steep
4
tiresome(adjective, severe, harsh, offensive)
3
cantankerous(adjective, mean, tough, severe, evil)
3
challenging(adjective, great, tough, awkward)
3
enigmatic(obscure, solid, unclear, dense)
3
fussy
3
great(adjective, person, body, strong, tough)
3
hairy(adjective, mean, tough, severe, sharp)
3
slavish(adjective, awkward, demanding, grueling)
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APASmart Define. (2016). hard thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/hard/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, hard thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>.
MLASmart Define. "hard thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms>