- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
104 entries under tough topic. ×
| daunting(adjective, awful, horrible, grand) | |
| menacing(adjective, bad, severe, unpleasant) | |
| strenuous(adjective, severe, rough, difficult) | |
| horrific(adjective, bad, great, fear) | |
| imposing(adjective, awful, wonderful, horrible) | |
| rough(adjective, hard, nasty, difficult) | |
| terrifying(adjective, awful, wonderful, grand) | |
| horrible(adjective, great, unpleasant, awful) | |
| severe(adjective, appearance, great, difficult) | |
| toilsome(adjective, severe, difficulty, difficult) | |
| uphill(adjective, severe, rough, difficult) | |
| demanding(adjective, severe, rough, difficult) | |
| effortful(adjective, severe, difficult, heavy) | |
| fierce(adjective, great, heavy, horrible) | |
| great(adjective, difficult, big, large) | |
| overwhelming(adjective, great, awful, grand) | |
| challenging(adjective, severe, difficult, awkward) | |
| dangerous(adjective, hard, severe, evil) | |
| operose(adjective, severe, difficulty, rough) | |
| threatening(adjective, severe, unpleasant, important) |
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| APA | Smart Define. (2015). formidable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, formidable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>. |
| MLA | Smart Define. "formidable thesaurus" 17 July 2015. Web. 25 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms> |