SimilarityRank
be_not_always_easy 0.791 89460
it_be_not_easy 0.783 29647
be_not_an_easy_task 0.779 79512
can_be_difficult 0.751 30674
be_very_difficult 0.747 37607
be_extremely_difficult 0.728 97037
it_be_not_easy_to 0.707 49178
can_be_hard 0.707 97851
difficult 0.695 2515
not_easy 0.674 65092
can_be_challenging 0.671 59256
it_be_very_difficult_to 0.650 29790
be_very_hard 0.649 91214
be_tricky 0.648 48836
be_tough 0.642 11759
be_not_difficult 0.640 90795
very_difficult 0.622 34974
it_be_difficult 0.621 31149
it_be_very_hard_to 0.617 86037
can_be_tricky 0.613 72729
a_difficult 0.607 12053
it_take_a_lot_of 0.607 41631
it_be_tough 0.606 29779
be_hard_to 0.606 23656
be_complicate 0.602 31245