- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
104 entries under tough topic. ×
| feller(deep, meaningful) | |
| scabrous(adjective, rough, difficult, heavy) | |
| unsparing(adjective, rough, difficult, heavy) | |
| upsetting(great, disgusting, shocking, tricky) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 26 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |