Synonyms|281Antonyms|82|Broader|4Narrower|0Related|1.5k

42 entries under severe topic. ×

42
immense(adjective, feature, characteristic, tough)
40
formidable(adjective, feature, characteristic, tough)
38
heavy(adjective, feature, characteristic, tough)
15
titanic(adjective, tough, big, large)
12
gargantuan(adjective, strong, tough, big)
10
laborious(adjective, strong, hard, tough)
7
strenuous(adjective, strong, tough, difficult)
5
tough(adjective, strong, difficulty, difficult)
4
arduous(adjective, tough, difficulty, difficult)
4
toilsome(adjective, tough, difficulty, difficult)
3
onerous(adjective, tough, difficulty, difficult)
3
operose(adjective, tough, difficulty, difficult)
3
troublesome(adjective, tough, difficulty, rough)
2
burdensome(adjective, tough, difficult, awkward)
2
demanding(adjective, tough, rough, difficult)
2
effortful(adjective, tough, difficult, awkward)
2
exacting(adjective, tough, rough, difficult)
2
stiff(adjective, tough, difficult, painful)
2
uphill(adjective, tough, difficult, awkward)
2
wearisome(adjective, tough, difficult, awkward)
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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>