| Similarity | Rank | |
|---|---|---|
| the_unique_challenge | 0.701 | 90230 |
| challenge_associate_with | 0.678 | 61107 |
| challenge_relate_to | 0.677 | 80453 |
| challenge_face | 0.672 | 32972 |
| various_challenge | 0.665 | 99907 |
| common_challenge | 0.664 | 99524 |
| specific_problem | 0.661 | 57049 |
| challenge | 0.661 | 222 |
| current_challenge | 0.661 | 50315 |
| these_challenge | 0.659 | 16957 |
| the_challenge_face | 0.654 | 22143 |
| challenge_face_by | 0.648 | 66867 |
| different_challenge | 0.643 | 83598 |
| the_challenge_face_by | 0.626 | 42818 |
| the_major_challenge | 0.624 | 66525 |
| challenge_they_face | 0.623 | 44286 |
| the_key_challenge | 0.622 | 74955 |
| many_challenge | 0.616 | 34197 |
| specific_issue | 0.611 | 39698 |
| major_challenge | 0.607 | 94021 |
| the_main_challenge | 0.604 | 52376 |
| future_challenge | 0.585 | 41206 |
| issue_face | 0.585 | 32083 |
| key_issue | 0.583 | 15544 |
| common_issue | 0.583 | 90970 |