| Similarity | Rank | |
|---|---|---|
| many_challenge | 0.731 | 34197 |
| challenge | 0.678 | 222 |
| different_challenge | 0.670 | 83598 |
| specific_challenge | 0.665 | 92340 |
| these_challenge | 0.659 | 16957 |
| challenge_face | 0.626 | 32972 |
| face_many_challenge | 0.619 | 78198 |
| face_challenge | 0.619 | 51525 |
| major_challenge | 0.617 | 94021 |
| current_challenge | 0.616 | 50315 |
| challenge_they_face | 0.608 | 44286 |
| the_challenge_face | 0.607 | 22143 |
| the_key_challenge | 0.607 | 74955 |
| the_major_challenge | 0.606 | 66525 |
| the_challenge_face_by | 0.604 | 42818 |
| challenge_relate_to | 0.603 | 80453 |
| new_challenge | 0.601 | 18398 |
| challenge_associate_with | 0.596 | 61107 |
| challenge_face_by | 0.589 | 66867 |
| the_unique_challenge | 0.588 | 90230 |
| great_challenge | 0.583 | 59535 |
| the_main_challenge | 0.582 | 52376 |
| the_challenge_pose_by | 0.581 | 96527 |
| obstacle | 0.576 | 6103 |
| various_problem | 0.576 | 94278 |