57 entries under complex topic. ×

31
difficult(adjective, hard, tough, severe, evil)
23
hard(adjective, tough, evil, difficulty, rough)
22
arduous(adjective, hard, tough, difficulty, difficult)
11
vexing(adjective, hard, delicate, irritating)
9
thorny(adjective, hard, rough, difficult, delicate)
9
tricky(adjective, hard, tough, difficult)
7
knotty(adjective, hard, fancy, difficult)
7
ticklish(adjective, hard, tough, difficult, delicate)
6
formidable(adjective, hard, tough, severe, evil)
5
complicated(adjective, hard, severe, rough, difficult)
5
perplexing(adjective, hard, fancy, difficult)
5
problematic(adjective, hard, tough, fancy, severe)
4
intricate(adjective, hard, tough, fancy, severe)
3
delicate(hard, awkward, uneasy, tricky)
3
elaborate(adjective, hard, fancy, difficult)
3
problematical(adjective, hard, difficult, delicate, loose)
2
involved(adjective, hard, fancy, difficult)
1
Daedalean(adjective, hard, fancy, difficult)
1
Gordian(adjective, hard, fancy, difficult)
1
abstruse(adjective, hard, fancy, difficult, delicate)
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APASmart Define. (2016). troublesome thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/troublesome/thesaurus/synonyms
ChicagoSmart Define. 2016. "troublesome thesaurus" https://smartdefine.org/troublesome/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, troublesome thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/troublesome/thesaurus/synonyms>.
MLASmart Define. "troublesome thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/troublesome/thesaurus/synonyms>