SimilarityRank
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