| challengeable | |
| challenging(adjective, tough, severe, painful, tricky) | |
| conditional | |
| confounding | |
| confused | |
| confutative | |
| costly | |
| crucial(tough, severe, painful, trying) | |
| cryptic | |
| cumbrous(adjective, aroused negative) | |
| demanding(tough, severe, painful, trying, disorderly) | |
| deniable | |
| difficile(tough, severe, painful, trying) | |
| diffident(uncertain, nervous, doubtful, insecure, unsure) | |
| discomposing | |
| disconcerting | |
| dismaying | |
| disreputable(shaky, vague, ambiguous, unlikely, misleading) | |
| distracting | |
| dynamite(adjective, delicate, uncertain, unstable, doubtful) |
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| APA | Smart Define. (2016). problematic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/problematic/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "problematic thesaurus" https://smartdefine.org/problematic/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, problematic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/problematic/thesaurus/synonyms>. |
| MLA | Smart Define. "problematic thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/problematic/thesaurus/synonyms> |