1
planetary
1
problem(tough, severe, painful, problematic, trying)
1
problematic(tough, severe, painful, trying)
1
prohibitive(tough, severe, painful, problematic, trying)
1
rigid(tough, severe, painful, problematic, trying)
1
rugged(adjective, strong, tough, rough, difficult)
1
sound
1
staggering
1
strained
1
super
1
super-duper
1
taxing
1
thumping
1
thundering
1
toilful(adjective, tough, rough, difficult, heavy)
1
trying(tough, severe, painful, problematic)
1
unyielding(tough, severe, painful, problematic, trying)
1
upstream(tough, severe, painful, problematic, trying)
1
wearing(adjective, hard, tough, rough, difficult)
1
well-built(strong, solid, vigorous, sturdy, robust)
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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>