- Definitions|2
- Thesaurus|554
- Abbreviations|0
| unearthly | |
| ungodly | |
| unimaginable | |
| unintelligible(adjective, hard, obscure, delicate, ambiguous) | |
| unthinkable | |
| unworthy of belief(expression, idiom) | |
| uphill(adjective, difficult, complex, awkward, demanding) | |
| upsetting | |
| Daedalean(adjective, difficult, complex, intricate, thorny) | |
| arduous(adjective, difficult, complex, awkward, demanding) | |
| backbreaking(adjective, difficult, awkward, demanding, grueling) | |
| baffler | |
| between rock and hard place(adjective, debatable) | |
| between sixes and sevens(adjective, debatable) | |
| bone of contention(adjective, debatable) | |
| bothersome(adjective, difficult, awkward, demanding, grueling) | |
| burdensome(adjective, difficult, awkward, demanding, grueling) | |
| can of worms(expression, adjective, idiom, difficult, complex) | |
| changing | |
| clear as dishwater(adjective, ambiguous) |
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| APA | Smart Define. (2015). problematical thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/problematical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "problematical thesaurus" https://smartdefine.org/problematical/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, problematical thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/problematical/thesaurus/synonyms>. |
| MLA | Smart Define. "problematical thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/problematical/thesaurus/synonyms> |