54 entries under problematical topic. ×

35
laborious(adjective, work, hard, tough, severe)
29
hard(adjective, tough, severe, rough, difficult)
28
arduous(adjective, hard, tough, severe, rough)
27
backbreaking(adjective, hard, difficult, complex, awkward)
24
difficult(adjective, hard, tough, severe, rough)
24
toilsome(adjective, hard, tough, difficult, complex)
23
severe(adjective, hard, tough, difficult, violent)
22
burdensome(adjective, hard, tough, difficult, complex)
21
rugged(adjective, hard, severe, difficult, violent)
21
serious(adjective, hard, difficult, important, complex)
21
sticky(adjective, hard, difficult, complex, awkward)
20
intricate(adjective, hard, difficult, complex, awkward)
20
knotty(adjective, hard, severe, rough, difficult)
20
rough(adjective, hard, difficult, complex, awkward)
20
tricky(adjective, hard, difficult, complex, awkward)
19
involved(adjective, hard, difficult, complex, awkward)
19
toilful(adjective, hard, difficult, complex, awkward)
18
complicated(adjective, hard, difficult, complex, awkward)
18
grinding(adjective, hard, difficult, complex, awkward)
8
grueling(adjective, hard, tough, difficult, awkward)
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APASmart Define. (2015). operose thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/operose/thesaurus/synonyms
ChicagoSmart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, operose thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>.
MLASmart Define. "operose thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms>