- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
66 entries under complex topic. ×
| painful(adjective, hard, difficult) | |
| problematic(adjective, hard, difficult) | |
| sensitive(adjective, hard, difficult, subtle) | |
| toilsome(adjective, hard, difficult) | |
| unbearable(adjective, hard, difficult) | |
| sad(adjective, hard, difficult, greatness) | |
| dire(adjective, hard, difficult) | |
| labyrinthine(adjective, hard, difficult) | |
| leaden(adjective, hard, difficult) | |
| massive(adjective, hard, difficult) | |
| ponderous(adjective, hard, difficult) | |
| sheer(adjective, hard, difficult) | |
| obscure(adjective, hard, deep, mysterious) | |
| subtle(adjective, quiet, hard, slight, fine) | |
| mysterious(adjective, hard, obscure, delicate) | |
| arcane(adjective, obscure, deep, mysterious) | |
| occult(adjective, obscure, deep, thoughtful) | |
| scholarly(adjective, obscure, smart, bright) | |
| hidden(hard, obscure, deep, cunning) | |
| hermetic(adjective, obscure, deep, thoughtful) |
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| APA | Smart Define. (2016). profound thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/profound/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "profound thesaurus" https://smartdefine.org/profound/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, profound thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/profound/thesaurus/synonyms>. |
| MLA | Smart Define. "profound thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/profound/thesaurus/synonyms> |