117 entries under hard topic. ×

19
knotted(adjective, difficult, complex)
19
problematic(adjective, difficult, complex)
19
toilful(adjective, difficult, complex, awkward)
18
dire(adjective, difficult, complex)
18
disturbing(adjective, difficult, complex)
18
nasty(adjective, difficult, complex)
18
sensitive(adjective, difficult, complex)
18
sore(adjective, difficult, complex)
18
wearisome(adjective, dull, tough, difficult)
17
fatiguing(adjective, dull, difficult, awkward)
16
exhausting(adjective, dull, difficult, awkward)
14
demanding(adjective, dull, tough, severe)
14
heavy(adjective, dull, tough, severe)
14
stiff(adjective, tough, severe, rough)
14
troublesome(adjective, tough, severe, difficulty)
14
uphill(adjective, great, tough, easy)
11
exacting(adjective, dull, tough, severe)
10
grueling(adjective, tough, severe, difficult)
10
tiresome(adjective, dull, difficult, heavy)
9
strained(adjective, difficult, exertion)
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APASmart Define. (2016). laborious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/laborious/thesaurus/synonyms
ChicagoSmart Define. 2016. "laborious thesaurus" https://smartdefine.org/laborious/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, laborious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/laborious/thesaurus/synonyms>.
MLASmart Define. "laborious thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/laborious/thesaurus/synonyms>