Synonyms|679Antonyms|135|Broader|7Narrower|8Related|331

69 entries under severe topic. ×

2
immense(tough, painful, problematic, trying)
2
titanic(tough, painful, problematic, trying)
1
ambitious(tough, painful, problematic, trying)
1
arduous(tough, painful, problematic, weighty)
1
backbreaker(tough, painful, problematic, trying)
1
bothersome(tough, painful, problematic, trying)
1
burdensome(tough, big, heavy, substantial)
1
challenging(tough, painful, problematic, trying)
1
deep(original, basic, primary, weighty)
1
demanding(tough, important, serious, painful)
1
difficile(tough, painful, problematic, trying)
1
difficult(adjective, hard, tough, problematic)
1
easier said than done(expression, tough, painful, problematic)
1
effortful(tough, painful, problematic, trying)
1
exacting(tough, important, serious, painful)
1
far-reaching(big, important, significant, substantial)
1
galling(tough, painful, problematic, trying)
1
gargantuan(tough, painful, problematic, trying)
1
grievous(adjective, great, tough, heavy)
1
hard-won(tough, painful, problematic, trying)
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APASmart Define. (2016). crucial thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms
ChicagoSmart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, crucial thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>.
MLASmart Define. "crucial thesaurus" 11 March 2016. Web. 29 September 2026. <https://smartdefine.org/crucial/thesaurus/synonyms>