SimilarityRank
very_difficult 0.843 34974
a_difficult 0.782 12053
be_very_difficult 0.772 37607
extremely_difficult 0.771 93625
more_difficult 0.746 14322
be_extremely_difficult 0.724 97037
tricky 0.713 23559
,_if_not_impossible 0.698 78666
be_not_easy 0.695 17254
the_most_difficult 0.694 35489
can_be_difficult 0.679 30674
not_easy 0.672 65092
arduous 0.671 48005
challenging 0.670 6371
frustrating 0.668 15978
impossible 0.664 8196
complicated 0.661 9149
daunting 0.658 43508
it_be_difficult 0.657 31149
time_consuming 0.657 21184
more_challenging 0.653 31394
difficult_to 0.649 44136
time-consuming 0.646 22450
be_the_most_difficult 0.643 91080
difficult_for 0.641 44678