40 entries under complex topic. ×

23
thorny(adjective, hard, difficult)
21
taxing(adjective, hard, difficult, laborious)
21
tight(adjective, hard, difficult)
20
elaborate(adjective, hard, difficult, exertion)
20
intricate(adjective, hard, difficult, awkward)
20
leaden(adjective, hard, difficult)
20
profound(adjective, hard, difficult)
20
weighty(adjective, hard, difficult)
19
ambitious(adjective, hard, difficult)
19
grave(adjective, hard, difficult)
19
grievous(adjective, hard, difficult)
19
hefty(adjective, hard, difficult)
19
knotted(adjective, hard, difficult)
19
ponderous(adjective, hard, difficult)
19
problematic(adjective, hard, difficult)
19
serious(adjective, hard, difficult, harsh, cruel)
19
toilful(adjective, hard, difficult, awkward)
18
disturbing(adjective, hard, difficult)
18
involved(adjective, hard, difficult, awkward)
18
sticky(adjective, hard, difficult, awkward)
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APASmart Define. (2015). toilsome thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/toilsome/thesaurus/synonyms
ChicagoSmart Define. 2015. "toilsome thesaurus" https://smartdefine.org/toilsome/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, toilsome thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/toilsome/thesaurus/synonyms>.
MLASmart Define. "toilsome thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/toilsome/thesaurus/synonyms>