| Similarity | Rank | |
|---|---|---|
| an_unknown | 0.742 | 28787 |
| unidentified | 0.596 | 37581 |
| unknowable | 0.593 | 80212 |
| known | 0.591 | 19458 |
| not_know | 0.590 | 17980 |
| mysterious | 0.577 | 8906 |
| uncertain | 0.574 | 15816 |
| be_unknown | 0.572 | 8723 |
| undiscovered | 0.571 | 89654 |
| unseen | 0.562 | 17523 |
| previously_unknown | 0.549 | 80431 |
| undisclosed | 0.529 | 82824 |
| unexpected | 0.528 | 6740 |
| hidden | 0.519 | 8770 |
| unfamiliar | 0.519 | 23686 |
| undefined | 0.518 | 33305 |
| unnamed | 0.512 | 42669 |
| remain_unknown | 0.512 | 95834 |
| uncertainty | 0.503 | 3746 |
| unforeseen | 0.490 | 60419 |
| untested | 0.487 | 54569 |
| enigmatic | 0.479 | 36412 |
| ambiguous | 0.476 | 23665 |
| strange | 0.475 | 4507 |
| be_uncertain | 0.475 | 25526 |