- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
416 entries under adjective topic. ×
| all-powerful(tough, difficult, overwhelming, prevailing) | |
| complex(hard, difficult, delicate, heavy) | |
| direful | |
| dismaying(difficult, horrible, overwhelming, terrifying) | |
| exacting(tough, severe, rough, difficult) | |
| grisly(appearance, awful, terrible, shocking) | |
| gruesome(appearance, awful, terrible, shocking) | |
| harsh(hard, great, severe, rough) | |
| indomitable(difficult, overwhelming) | |
| influential(powerful, prevailing, commanding) | |
| labored(tough, severe, difficult, heavy) | |
| stiff(great, tough, severe, difficult) | |
| sturdy(strong, prevailing, influential, commanding) | |
| ticklish(bad, hard, tough, difficult) | |
| titan(feature, characteristic, size) | |
| tricky(hard, tough, difficult, complex) | |
| troublesome(hard, tough, severe, evil) | |
| unnerving | |
| astonishing(awful, wonderful, amazing, grand) | |
| astounding(great, awful, terrible, grand) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 24 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |