140 entries under complex topic. ×

4
busy(adjective, happy, energetic, lively, active)
4
mixed(adjective, hard, fancy, obscure, difficult)
4
subtle(adjective, hard, obscure, tricky)
3
detailed(adjective, complicated, intricate, daedal)
3
fancy(adjective, hard, difficult, sophisticated)
3
multifarious
3
mysterious(adjective, hard, obscure, tricky)
3
ornate(adjective, complicated, detailed, intricate)
2
delicate(hard, awkward, tricky, complicated)
2
exact(adjective, complicated, detailed, intricate)
2
many-faceted(adjective, complicated, detailed, intricate)
2
meandering(hard, obscure, sophisticated, tricky)
2
muddled(adjective, obscure, sophisticated, complicated)
2
precise(adjective, complicated, detailed, intricate)
2
problematical(adjective, hard, difficult, delicate, loose)
2
rococo(adjective, difficult, sophisticated, elaborate)
2
troublesome(adjective, hard, fancy, difficult)
1
Daedalean(adjective, hard, fancy, obscure, difficult)
1
can of worms(expression, adjective, idiom, hard, fancy)
1
effortful(adjective, tough, rough, difficult, heavy)
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APASmart Define. (2015). involved thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/involved/thesaurus/synonyms
ChicagoSmart Define. 2015. "involved thesaurus" https://smartdefine.org/involved/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, involved thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/involved/thesaurus/synonyms>.
MLASmart Define. "involved thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/involved/thesaurus/synonyms>