- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
101 entries under hard topic. ×
| difficult(adjective, tough, severe, evil) | |
| rough(adjective, tough, nasty, difficult) | |
| rugged(adjective, severe, evil, rough) | |
| dangerous(adjective, tough, severe, evil) | |
| knotty(adjective, severe, rough, difficult) | |
| serious(adjective, bad, difficult, unpleasant) | |
| complex(adjective, difficult, delicate, heavy) | |
| harsh(adjective, great, severe, rough) | |
| ticklish(adjective, bad, tough, difficult) | |
| tricky(adjective, tough, difficult, complex) | |
| troublesome(adjective, tough, severe, evil) | |
| rude(adjective, rough, nasty, cruel) | |
| ugly(adjective, bad, tough, severe) | |
| complicated(adjective, tough, severe, rough) | |
| murder(adjective, tough, severe, rough) | |
| painful(adjective, tough, severe, difficult) | |
| rigorous(adjective, tough, severe, rough) | |
| taxing(adjective, tough, severe, rough) | |
| abstruse(intense, heavy, fierce, tricky) | |
| backbreaking(adjective, tough, severe, rough) |
For more, visit
Formidable on
Power Thesaurus
| 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> |