140 entries under adjective topic. ×

23
oppressive(hard, difficult, complex)
23
thorny(hard, difficult, complex)
21
taxing(hard, difficult, complex, laborious)
21
tight(hard, difficult, complex)
20
elaborate(hard, difficult, complex, exertion)
20
intricate(hard, difficult, complex, awkward)
20
leaden(hard, difficult, complex)
20
profound(hard, difficult, complex)
20
weighty(hard, difficult, complex)
19
ambitious(hard, difficult, complex)
19
grave(hard, difficult, complex)
19
grievous(hard, difficult, complex)
19
hefty(hard, difficult, complex)
19
knotted(hard, difficult, complex)
19
ponderous(hard, difficult, complex)
19
problematic(hard, difficult, complex)
19
serious(hard, difficult, harsh, cruel)
19
toilful(hard, difficult, complex, awkward)
18
disturbing(hard, difficult, complex)
18
involved(hard, difficult, complex, awkward)
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APASmart Define. (2015). toilsome thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/toilsome/thesaurus/synonyms
ChicagoSmart Define. 2015. "toilsome thesaurus" https://smartdefine.org/toilsome/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, toilsome thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/toilsome/thesaurus/synonyms>.
MLASmart Define. "toilsome thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/toilsome/thesaurus/synonyms>