- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
66 entries under complex topic. ×
| deep(noun, adjective, good, feeling, strong) | |
| serious(adjective, hard, difficult, deep) | |
| esoteric(adjective, hard, easy, obscure, difficult) | |
| difficult(adjective, hard, thoughtful, intellectual) | |
| hard(adjective, difficult, intense, emotional) | |
| weighty(adjective, hard, difficult, thoughtful) | |
| severe(adjective, hard, difficult, intense) | |
| knotty(adjective, hard, difficult) | |
| intricate(adjective, hard, difficult) | |
| involved(adjective, hard, difficult) | |
| tricky(adjective, hard, difficult, cunning) | |
| laborious(adjective, hard, difficult) | |
| thorny(adjective, hard, difficult) | |
| arduous(adjective, hard, difficult) | |
| grave(adjective, hard, difficult, greatness) | |
| grievous(adjective, hard, difficult) | |
| sophisticated(adjective, hard, difficult, intelligent) | |
| backbreaking(adjective, hard, difficult) | |
| complicated(adjective, hard, difficult) | |
| heartrending(adjective, hard, difficult, intense) |
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| APA | Smart Define. (2016). profound thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/profound/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "profound thesaurus" https://smartdefine.org/profound/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, profound thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/profound/thesaurus/synonyms>. |
| MLA | Smart Define. "profound thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/profound/thesaurus/synonyms> |