| Similarity | Rank | |
|---|---|---|
| challenge_associate_with | 0.772 | 61107 |
| issue_associate_with | 0.729 | 59758 |
| issue_relate_to | 0.718 | 11960 |
| specific_challenge | 0.677 | 92340 |
| challenge_face | 0.674 | 32972 |
| current_challenge | 0.667 | 50315 |
| problem_relate_to | 0.663 | 33222 |
| issue_regard | 0.657 | 47179 |
| problem_associate_with | 0.651 | 33102 |
| issue_surround | 0.643 | 28254 |
| concern_relate_to | 0.641 | 82451 |
| challenge_face_by | 0.637 | 66867 |
| issue_such_as | 0.628 | 21073 |
| common_challenge | 0.626 | 99524 |
| issue_around | 0.625 | 31128 |
| the_major_challenge | 0.624 | 66525 |
| these_challenge | 0.615 | 16957 |
| major_challenge | 0.609 | 94021 |
| issue_concern | 0.607 | 41364 |
| issue_pertain_to | 0.604 | 92021 |
| various_challenge | 0.603 | 99907 |
| the_key_challenge | 0.598 | 74955 |
| the_main_challenge | 0.591 | 52376 |
| many_challenge | 0.584 | 34197 |
| the_unique_challenge | 0.581 | 90230 |