100 entries under hard topic. ×

43
laborious(adjective, great, tough, difficulty)
41
arduous(adjective, great, tough, difficulty)
37
difficult(adjective, great, tough, difficulty)
34
tough(adjective, difficulty, difficult, complex)
32
burdensome(adjective, tough, difficult, complex)
28
backbreaking(adjective, difficult, complex, awkward)
27
operose(adjective, tough, difficulty, difficult)
27
rough(adjective, great, tough, difficult)
27
severe(adjective, tough, difficult, harsh)
27
trying(adjective, difficult, complex, weary)
25
knotty(adjective, difficult, complex, awkward)
24
complex(adjective, difficult)
24
painful(adjective, difficult, complex)
24
punishing(adjective, difficult, complex)
24
stressful(adjective, difficult, complex)
24
tricky(adjective, difficult, complex, awkward)
23
rugged(adjective, difficult, harsh, cruel)
23
complicated(adjective, difficult, complex, awkward)
23
grinding(adjective, difficult, harsh, cruel)
23
oppressive(adjective, difficult, complex)
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APASmart Define. (2015). toilsome thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/toilsome/thesaurus/synonyms
ChicagoSmart Define. 2015. "toilsome thesaurus" https://smartdefine.org/toilsome/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, toilsome thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/toilsome/thesaurus/synonyms>.
MLASmart Define. "toilsome thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/toilsome/thesaurus/synonyms>