95 entries under tough topic. ×

11
exacting(adjective, dull, hard, severe)
10
grueling(adjective, hard, severe, difficult)
8
effortful(adjective, hard, great, rough)
7
labored(adjective, hard, great, rough)
6
Herculean(adjective, strong, hard, severe)
6
rigorous(adjective, hard, severe, rough)
5
not easy(expression, idiom, severe, difficulty)
4
fussy(adjective, difficult, problematic, trying)
3
bothersome(adjective, severe, difficult, awkward)
3
challenging(adjective, great, severe, difficult)
3
finicky(adjective, difficult, problematic, trying)
2
difficile(adjective, severe, rough, difficult)
2
irritating(adjective, dull, severe, boring)
2
no picnic(expression, severe, rough, difficult)
2
slavish(adjective, rough, difficult, heavy)
2
terrible(adjective, hard, severe, rough)
2
testing(adjective, severe, difficult, violent)
2
threatening(hard, severe, offensive, weighty)
2
titanic(severe, painful, problematic, trying)
2
unsparing(adjective, rough, difficult, heavy)
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APASmart Define. (2016). laborious thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/laborious/thesaurus/synonyms
ChicagoSmart Define. 2016. "laborious thesaurus" https://smartdefine.org/laborious/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, laborious thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/laborious/thesaurus/synonyms>.
MLASmart Define. "laborious thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/laborious/thesaurus/synonyms>