- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
70 entries under hard topic. ×
| painful(adjective, difficult, complex) | |
| problematic(adjective, difficult, complex) | |
| sensitive(adjective, difficult, complex, subtle) | |
| toilsome(adjective, difficult, complex) | |
| unbearable(adjective, difficult, complex) | |
| sad(adjective, difficult, complex, greatness) | |
| dire(adjective, difficult, complex) | |
| extreme(adjective, strong, great, sharp) | |
| labyrinthine(adjective, difficult, complex) | |
| leaden(adjective, difficult, complex) | |
| massive(adjective, difficult, complex) | |
| ponderous(adjective, difficult, complex) | |
| sheer(adjective, difficult, complex) | |
| unfathomable(adjective, complete, obscure, difficult) | |
| great(adjective, strong, intense, powerful) | |
| obscure(adjective, complex, deep, mysterious) | |
| subtle(adjective, quiet, slight, fine) | |
| mysterious(adjective, obscure, delicate, complex) | |
| strong(adjective, strong, great, sharp) | |
| enigmatic(adjective, obscure, deep, tricky) |
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| APA | Smart Define. (2016). profound thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/profound/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "profound thesaurus" https://smartdefine.org/profound/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, profound thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/profound/thesaurus/synonyms>. |
| MLA | Smart Define. "profound thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/profound/thesaurus/synonyms> |