34 entries under complex topic. ×

19
elaborate(adjective, hard, difficult)
19
grave(adjective, hard, tough, severe, difficult)
19
hefty(adjective, hard, difficult)
19
involved(adjective, hard, difficult, awkward)
19
knotted(adjective, hard, difficult)
19
oppressive(adjective, hard, difficult)
19
problematic(adjective, hard, difficult)
19
taxing(adjective, hard, difficult)
19
toilful(adjective, hard, difficult, awkward)
19
trying(adjective, hard, difficult)
18
complicated(adjective, hard, difficult, awkward)
18
grinding(adjective, hard, difficult, awkward)
18
nasty(adjective, hard, difficult)
18
weighty(adjective, hard, difficult)
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APASmart Define. (2015). operose thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/operose/thesaurus/synonyms
ChicagoSmart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, operose thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>.
MLASmart Define. "operose thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms>