86 entries under hard topic. ×

23
hefty(adjective, dull, difficult, harsh)
23
massive(adjective, difficult, heavy, complex)
22
harsh(adjective, tough, severe, rough)
22
ponderous(adjective, difficult, heavy, complex)
22
rough(adjective, severe, difficult, heavy)
22
toilsome(adjective, difficult, complex)
21
complex(adjective, difficult, tedious, demanding)
21
complicated(adjective, difficult, complex, tedious)
21
onerous(adjective, dull, tough, severe)
21
punishing(adjective, difficult, complex)
21
stressful(adjective, difficult, complex)
21
tight(adjective, difficult, complex)
20
disturbing(adjective, difficult, complex)
20
fusty(adjective, warm, difficult, complex)
20
knotty(adjective, difficult, complex)
20
rugged(adjective, difficult, complex)
20
serious(adjective, difficult, complex)
20
stale(adjective, warm, difficult, complex)
20
thorny(adjective, difficult, complex)
20
tricky(adjective, difficult, complex)
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APASmart Define. (2015). oppressive thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/oppressive/thesaurus/synonyms
ChicagoSmart Define. 2015. "oppressive thesaurus" https://smartdefine.org/oppressive/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, oppressive thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/oppressive/thesaurus/synonyms>.
MLASmart Define. "oppressive thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/oppressive/thesaurus/synonyms>