SimilarityRank
the_major_challenge 0.792 66525
the_big_challenge 0.754 19695
the_key_challenge 0.734 74955
major_challenge 0.704 94021
the_main_problem 0.702 46787
another_challenge 0.693 48760
the_great_challenge 0.684 32862
big_challenge 0.672 46944
the_main_issue 0.660 33447
the_main_concern 0.628 62045
specific_challenge 0.604 92340
the_big_problem 0.601 25566
great_challenge 0.599 59535
current_challenge 0.596 50315
major_problem 0.594 34279
challenge_relate_to 0.591 80453
key_issue 0.590 15544
challenge_associate_with 0.586 61107
various_challenge 0.582 99907
the_most_important_issue 0.581 75837
challenge_face 0.576 32972
challenge 0.572 222
many_challenge 0.571 34197
the_main_problem_be 0.570 96132
future_challenge 0.552 41206