- Definitions|2
- Thesaurus|2.4k
- Abbreviations|0
95 entries under dreadful topic. ×
| tremendous(adjective, feature, characteristic, great, difficult) | |
| fearful(adjective, great, awful, fear, horrible) | |
| frightful(adjective, great, tough, terrible, fear) | |
| terrible(adjective, appearance, bad, great, nasty) | |
| appalling(adjective, bad, great, tough, fear) | |
| menacing(adjective, bad, tough, severe, unpleasant) | |
| rough(adjective, hard, tough, nasty, difficult) | |
| shocking(adjective, appearance, bad, great, unpleasant) | |
| dread | |
| horrible(adjective, great, tough, unpleasant, awful) | |
| fierce(adjective, great, tough, heavy, horrible) | |
| dangerous(adjective, hard, tough, severe, evil) | |
| serious(adjective, bad, hard, difficult, unpleasant) | |
| threatening(adjective, tough, severe, unpleasant, important) | |
| grisly(adjective, appearance, awful, terrible, shocking) | |
| gruesome(adjective, appearance, awful, terrible, shocking) | |
| troublesome(adjective, hard, tough, severe, evil) | |
| fell(adjective, tough, severe, unpleasant, important) | |
| forbidding(adjective, appearance, tough, unpleasant, terrible) | |
| impregnable(adjective, horrible, terrifying) |
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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> |