106 entries under complex topic. ×
| hidden(adjective, hard, obscure, dark, heavy) | |
| unclear(adjective, hard, obscure, uncertain) | |
| Daedalean(adjective, hard, fancy, involved) | |
| ambiguous(adjective, obscure, tricky, hidden) | |
| can of worms(expression, adjective, idiom, hard, fancy) | |
| entangled(adjective, hard, fancy, sophisticated) | |
| gasser(adjective, hard, fancy, intricate) | |
| hermetic(obscure, deep, thoughtful, reflective) | |
| hi-tech(adjective, hard, fancy, intricate) | |
| high-tech(adjective, sophisticated, involved, elaborate) | |
| interlaced(adjective, hard, fancy, intricate) | |
| mega factor(expression, adjective, hard, fancy) | |
| mixed(adjective, hard, fancy, involved) | |
| occult(obscure, strange, deep, thoughtful) | |
| orphic(obscure, deep, thoughtful, reflective) | |
| unintelligible(adjective, hard, obscure, uncertain) | |
| various(adjective, hard, fancy, intricate) | |
| wheels within wheels(expression, adjective, idiom, hard, fancy) | |
| acroamatic(obscure, deep, thoughtful, reflective) | |
| baroque(adjective, sophisticated, involved, elaborate) |
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| APA | Smart Define. (2016). difficult thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/difficult/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "difficult thesaurus" https://smartdefine.org/difficult/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, difficult thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/difficult/thesaurus/synonyms>. |
| MLA | Smart Define. "difficult thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/difficult/thesaurus/synonyms> |