1
great
1
gross(big, huge, vast, monstrous, copious)
1
gruelling
1
hard-won(tough, severe, painful, problematic, trying)
1
harder
1
hardy
1
high
1
infinite
1
intense
1
intricate(adjective, tough, severe, rough, difficult)
1
irksome(adjective, tough, difficulty, rough, difficult)
1
irritating(tough, severe, painful, problematic, trying)
1
labored(adjective, tough, severe, difficult, awkward)
1
mean(adjective, tough, rough, difficult, heavy)
1
no picnic(expression, tough, severe, painful, problematic)
1
not easy(expression, idiom, tough, severe, difficulty)
1
painful(tough, severe, difficult, problematic, trying)
1
palestric
1
pharaonic
1
phenomenal
13 years ago|14k views|share |citing 
APASmart Define. (2013). herculean thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/herculean/thesaurus/synonyms
ChicagoSmart Define. 2013. "herculean thesaurus" https://smartdefine.org/herculean/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2013, herculean thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/herculean/thesaurus/synonyms>.
MLASmart Define. "herculean thesaurus" 28 June 2013. Web. 30 September 2026. <https://smartdefine.org/herculean/thesaurus/synonyms>