54 entries under problematical topic. ×

42
intricate(adjective, hard, simple, evil, difficulty)
39
complicated(adjective, hard, simple, evil, difficulty)
38
difficult(adjective, hard, rough, difficult, delicate)
35
involved(adjective, hard, simple, difficult, delicate)
32
hard(adjective, severe, rough, difficult, violent)
30
tricky(adjective, hard, difficult, delicate, complex)
28
rugged(adjective, hard, severe, difficulty, difficult)
28
sticky(adjective, hard, difficult, delicate, informal)
27
rough(adjective, hard, difficult, complex, coarse)
26
arduous(adjective, hard, severe, rough, difficult)
25
laborious(adjective, hard, severe, rough, difficult)
24
severe(adjective, hard, difficult, violent, complex)
24
toilsome(adjective, hard, difficult, complex, awkward)
21
burdensome(adjective, hard, difficult, complex, awkward)
21
grinding(adjective, hard, difficult, complex, awkward)
20
operose(adjective, hard, severe, rough, difficult)
19
backbreaking(adjective, hard, difficult, complex, awkward)
19
serious(adjective, hard, difficult, complex, awkward)
19
toilful(adjective, hard, difficult, complex, awkward)
8
troublesome(adjective, hard, fancy, difficult, complex)
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APASmart Define. (2015). knotty thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/knotty/thesaurus/synonyms
ChicagoSmart Define. 2015. "knotty thesaurus" https://smartdefine.org/knotty/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, knotty thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/knotty/thesaurus/synonyms>.
MLASmart Define. "knotty thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/knotty/thesaurus/synonyms>