SimilarityRank
new_challenge 0.707 18398
great_challenge 0.690 59535
many_challenge 0.687 34197
these_challenge 0.680 16957
various_challenge 0.678 99907
specific_challenge 0.661 92340
different_challenge 0.658 83598
another_challenge 0.653 48760
major_challenge 0.647 94021
current_challenge 0.626 50315
challenging 0.620 6371
a_new_challenge 0.616 76110
big_challenge 0.613 46944
the_great_challenge 0.612 32862
face_challenge 0.609 51525
challenge_face 0.606 32972
the_major_challenge 0.603 66525
Challenge 0.602 5659
obstacle 0.594 6103
the_big_challenge 0.592 19695
Challenges 0.592 14291
future_challenge 0.588 41206
the_challenge_ahead 0.585 59436
technical_challenge 0.579 52969
challenge_associate_with 0.578 61107