- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
104 entries under difficult topic. ×
| stiff(adjective, great, tough, severe) | |
| ticklish(adjective, bad, hard, tough) | |
| tricky(adjective, hard, tough, complex) | |
| troublesome(adjective, hard, tough, severe, evil) | |
| hairy(adjective, bad, severe, rough) | |
| sticky(adjective, tough, rough, heavy) | |
| complicated(adjective, hard, tough, severe, rough) | |
| grave(adjective, tough, severe, unpleasant) | |
| mean(adjective, bad, severe, rough, nasty) | |
| murder(adjective, hard, tough, severe, rough) | |
| oppressive(adjective, heavy) | |
| overpowering(adjective, powerful, overwhelming) | |
| painful(adjective, hard, tough, severe) | |
| puissant(adjective, tough, overwhelming, prevailing) | |
| rigorous(adjective, hard, tough, severe, rough) | |
| taxing(adjective, hard, tough, severe, rough) | |
| wearing(adjective, tough, rough, heavy) | |
| wearisome(adjective, tough, severe, awkward) | |
| wearying(adjective, tough, rough, heavy) | |
| backbreaking(adjective, hard, tough, severe, rough) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 20 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |