- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
75 entries under tough topic. ×
| important(adjective, great, severe, extraordinary) | |
| urgent(adjective, severe, big, heavy) | |
| momentous(adjective, great, severe, extraordinary) | |
| significant(adjective, great, severe, extraordinary) | |
| grave(adjective, great, severe, big) | |
| major(adjective, great, severe, heavy) | |
| pressing(adjective, severe, big, heavy) | |
| weighty(adjective, great, severe, big) | |
| heavy(adjective, great, severe, extraordinary) | |
| severe(adjective, big, heavy, deep) | |
| immense(severe, painful, problematic, trying) | |
| titanic(severe, painful, problematic, trying) | |
| ambitious(severe, painful, problematic, trying) | |
| arduous(severe, painful, problematic, weighty) | |
| backbreaker(severe, painful, problematic, trying) | |
| bothersome(severe, painful, problematic, trying) | |
| burdensome(severe, big, heavy, substantial) | |
| challenging(severe, painful, problematic, trying) | |
| demanding(severe, important, serious, painful) | |
| difficile(severe, painful, problematic, trying) |
For more, visit
Crucial on
Power Thesaurus
| APA | Smart Define. (2016). crucial thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/crucial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "crucial thesaurus" https://smartdefine.org/crucial/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2016, crucial thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/crucial/thesaurus/synonyms>. |
| MLA | Smart Define. "crucial thesaurus" 11 March 2016. Web. 1 October 2026. <https://smartdefine.org/crucial/thesaurus/synonyms> |