- Definitions|2
- Thesaurus|817
- Abbreviations|0
260 entries under adjective topic. ×
| difficult(hard, great, tough, awkward) | |
| daring(verb, defiant, confronting, defying) | |
| ambitious(ability, importance, effort, main) | |
| disputing(verb, opposing, questioning, disagreeing) | |
| exciting(importance, valuable, main, notable) | |
| thought-provoking | |
| defiant(unwilling, opposed, defiant, disobedient) | |
| formidable(tough, severe, difficult, awkward) | |
| weighty(importance, valuable, main, notable) | |
| bold | |
| conflicting(verb, rival, opposing, defiant) | |
| opposing(verb, rival, opposing, unwilling) | |
| provocative | |
| serious(hard, tough, difficult, importance) | |
| audacious | |
| consequential(importance, valuable, main, notable) | |
| influential(importance, valuable, main, notable) | |
| key-note(importance, valuable, main, notable) | |
| newsworthy(importance, valuable, main, notable) | |
| severe(hard, tough, difficult, awkward) |
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| APA | Smart Define. (2016). challenging thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/challenging/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "challenging thesaurus" https://smartdefine.org/challenging/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, challenging thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/challenging/thesaurus/synonyms>. |
| MLA | Smart Define. "challenging thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/challenging/thesaurus/synonyms> |