| Similarity | Rank | |
|---|---|---|
| remain_a_mystery | 0.743 | 70041 |
| a_mystery | 0.692 | 26924 |
| remain_unknown | 0.644 | 95834 |
| no_one_know | 0.623 | 42689 |
| be_unknown | 0.618 | 8723 |
| mystery | 0.589 | 4754 |
| mystery_of | 0.589 | 9142 |
| nobody_know | 0.575 | 74533 |
| mysterious | 0.561 | 8906 |
| we_do_not_know | 0.557 | 21798 |
| be_not_know | 0.551 | 21842 |
| remain_unknown_. | 0.547 | 83257 |
| have_no_idea | 0.537 | 68416 |
| a_secret | 0.535 | 8979 |
| it_be_unknown | 0.533 | 73475 |
| be_beyond_me | 0.529 | 80936 |
| be_unclear | 0.510 | 18231 |
| never_know | 0.509 | 62448 |
| I_have_no_idea | 0.507 | 27343 |
| he_do_not_know | 0.505 | 53219 |
| be_not_clear | 0.502 | 25766 |
| do_not_know | 0.502 | 10490 |
| not_know | 0.501 | 17980 |
| secret | 0.492 | 1938 |
| puzzling | 0.484 | 48230 |