- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
104 entries under difficult topic. ×
| mighty(adjective, feature, characteristic, strong, tough) | |
| tremendous(adjective, feature, characteristic, great) | |
| heavy(adjective, feature, characteristic, tough, severe) | |
| colossal(adjective, feature, characteristic, great, tough) | |
| herculean(adjective, feature, characteristic, tough, severe) | |
| powerful(adjective, strong, tough, overwhelming) | |
| intimidating(adjective, awful, horrible, shocking) | |
| awesome(adjective, great, tough, wonderful) | |
| onerous(adjective, tough, severe, difficulty) | |
| terrible(adjective, appearance, bad, great, nasty) | |
| arduous(adjective, tough, severe, difficulty, rough) | |
| tough(adjective, strong, severe, difficulty, rough) | |
| impressive(adjective, tough, awful, wonderful) | |
| laborious(adjective, tough, severe, difficulty, rough) | |
| difficult(adjective, hard, tough, severe, evil) | |
| hard(adjective, tough, severe, evil, difficulty) | |
| burdensome(adjective, tough, severe, heavy) | |
| strenuous(adjective, tough, severe, rough) | |
| rough(adjective, hard, tough, nasty) | |
| severe(adjective, appearance, great, tough) |
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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> |