- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
416 entries under adjective topic. ×
| fell(tough, severe, unpleasant, important) | |
| forbidding(appearance, tough, unpleasant, terrible) | |
| hairy(bad, severe, rough, difficult) | |
| horrendous(bad, awful, terrible, shocking) | |
| impregnable(horrible, dreadful, terrifying) | |
| petrifying | |
| rude(hard, rough, nasty, cruel) | |
| stable | |
| steep(great, big, large, long) | |
| sticky(tough, rough, difficult, heavy) | |
| stout | |
| substantial | |
| ugly(bad, hard, tough, severe) | |
| complicated(hard, tough, severe, rough) | |
| energetic(strong, prevailing, influential, commanding) | |
| forceful(prevailing, influential, commanding) | |
| grave(tough, severe, difficult, unpleasant) | |
| hair-raising(awful, terrible, shocking, dreadful) | |
| hearty | |
| hideous(bad, awful, terrible, disgusting) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |