- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
77 entries under severe topic. ×
| knotty(adjective, hard, rough, difficult) | |
| operose(adjective, tough, difficulty, rough) | |
| threatening(adjective, tough, unpleasant, important) | |
| trying(adjective, tough, rough, difficult) | |
| weighty(adjective, harsh, heavy, painful) | |
| exacting(adjective, tough, rough, difficult) | |
| harsh(adjective, hard, great, rough) | |
| labored(adjective, tough, difficult, heavy) | |
| stiff(adjective, great, tough, difficult) | |
| troublesome(adjective, hard, tough, evil) | |
| fell(adjective, tough, unpleasant, important) | |
| hairy(adjective, bad, rough, difficult) | |
| ugly(adjective, bad, hard, tough) | |
| complicated(adjective, hard, tough, rough) | |
| grave(adjective, tough, difficult, unpleasant) | |
| mean(adjective, bad, rough, nasty) | |
| murder(adjective, hard, tough, rough) | |
| painful(adjective, hard, tough, difficult) | |
| rigorous(adjective, hard, tough, rough) | |
| taxing(adjective, hard, tough, rough) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |