97 entries under tough topic. ×

2
exhausting(adjective, hard, rough, difficult)
2
hairy(adjective, severe, rough, difficult)
2
herculean(adjective, severe, difficult, awkward)
2
irksome(adjective, rough, difficult, heavy)
2
labored(adjective, hard, severe, difficult)
2
no picnic(expression, hard, severe, rough)
2
not easy(expression, severe, painful, problematic)
2
rigorous(adjective, hard, severe, rough)
2
slavish(adjective, rough, difficult, heavy)
2
tiring(adjective, hard, rough, difficult)
2
titanic(severe, painful, problematic, trying)
1
backbreaker(severe, painful, problematic, trying)
1
bothersome(adjective, severe, rough, difficult)
1
challenging(adjective, severe, difficult, awkward)
1
crucial(severe, painful, problematic, weighty)
1
deep(adjective, severe, difficult, important)
1
easier said than done(expression, severe, painful, problematic)
1
far-reaching(adjective, severe, important, significant)
1
fateful(adjective, severe, important, significant)
1
fatiguing(adjective, hard, rough, difficult)
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APASmart Define. (2015). operose thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/operose/thesaurus/synonyms
ChicagoSmart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, operose thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>.
MLASmart Define. "operose thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms>