SimilarityRank
the_most_difficult 0.760 35489
the_most_challenging 0.713 54484
be_very_difficult 0.658 37607
difficult 0.643 2515
a_difficult 0.628 12053
be_extremely_difficult 0.608 97037
the_hard_part_of 0.607 73040
more_difficult 0.589 14322
very_difficult 0.588 34974
extremely_difficult 0.585 93625
the_most_rewarding 0.583 96855
be_a_tough 0.581 36164
the_big_challenge 0.580 19695
the_hard_thing 0.565 86990
be_very_hard 0.563 91214
be_probably_one_of 0.558 50295
be_by_far 0.558 18613
be_tough 0.558 11759
be_tricky 0.556 48836
the_hard_part 0.554 66943
it_be_very_difficult 0.544 71675
the_great_challenge 0.542 32862
probably_one_of 0.540 72637
be_not_easy 0.536 17254
the_most_complex 0.536 51425