205 entries under difficult topic. ×

18
sensitive(adjective, complex)
18
sheer(adjective, severe, cold, complex)
18
troublesome(adjective, tough, evil, difficulty, rough)
17
strenuous(adjective, dull, great, tough, severe)
17
uncompromising(adjective, mean, severe, rough)
16
exacting(adjective, dull, tough, easy, severe)
14
formidable(adjective, tough, severe, evil, difficulty)
14
heavy(adjective, person, dull, body, strong)
14
unpleasant(adjective, mean, cool, tough, severe)
13
exhausting(adjective, dull, tough, awkward)
13
mean(adjective, person, cool, tough, severe)
12
unsparing(adjective, mean, strong, tough, severe)
11
bitter(adjective, strong, love, tough, severe)
11
dense(adjective, person, body, strong, tough)
11
inclement(noun, adjective, nature, severe, rough)
11
powerful(adjective, person, body, strong, great)
11
stringent(adjective, tough, severe, rough, firm)
10
terrible(adjective, rough, harsh, tender)
10
tiring(adjective, dull, full, awkward)
10
uphill(adjective, great, tough, easy, severe)
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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>