126 entries under difficult topic. ×
| confused(adjective, involved, complicated, intricate) | |
| ticklish(adjective, hard, delicate, awkward) | |
| baffling(adjective, hard, delicate, awkward) | |
| entangled(adjective, hard, fancy, involved) | |
| fancy(noun, adjective, hard, passion, desire) | |
| mazy | |
| recondite(adjective, hard, fancy, obscure) | |
| snarled(adjective, complicated) | |
| enigmatic(adjective, hard, obscure, tricky) | |
| bewildering(adjective, hard, involved, tricky) | |
| demanding(adjective, tedious, onerous, tiring) | |
| formidable(adjective, hard, delicate, heavy) | |
| troublesome(adjective, hard, fancy, delicate) | |
| wheels within wheels(expression, adjective, idiom, hard, fancy) | |
| heavy(adjective, severe) | |
| impenetrable | |
| meandering(adjective, hard, tricky, complicated) | |
| strenuous | |
| unfathomable(adjective, hard, obscure, tricky) | |
| winding |
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| APA | Smart Define. (2016). complex thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/complex/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "complex thesaurus" https://smartdefine.org/complex/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, complex thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/complex/thesaurus/synonyms>. |
| MLA | Smart Define. "complex thesaurus" 11 January 2016. Web. 20 September 2026. <https://smartdefine.org/complex/thesaurus/synonyms> |