| Similarity | Rank | |
|---|---|---|
| solvable | 0.898 | 79398 |
| intractable | 0.839 | 38382 |
| vexing | 0.814 | 57669 |
| solved | 0.772 | 7831 |
| paradoxes | 0.750 | 49211 |
| unanswerable | 0.747 | 81176 |
| solve | 0.741 | 3373 |
| insurmountable | 0.732 | 30300 |
| unsolved | 0.721 | 37619 |
| conundrum | 0.718 | 31088 |
| paradox | 0.717 | 18277 |
| perplexing | 0.713 | 31002 |
| riddle | 0.703 | 34611 |
| irreducible | 0.702 | 72751 |
| baffling | 0.701 | 34300 |
| unknowable | 0.700 | 53536 |
| conundrums | 0.700 | 81680 |
| problem | 0.697 | 378 |
| fraught | 0.693 | 25023 |
| inescapable | 0.686 | 29961 |
| exasperating | 0.686 | 65409 |
| puzzling | 0.685 | 24981 |
| enigma | 0.681 | 37232 |
| quandary | 0.678 | 42760 |
| existential | 0.675 | 24908 |