SimilarityRank
be_an_exciting 0.686 32439
a_difficult 0.663 12053
a_challenging 0.651 34700
challenging 0.644 6371
the_most_challenging 0.613 54484
be_an_interesting 0.601 29539
be_a_tough 0.597 36164
be_a_fascinating 0.578 65502
a_rewarding 0.541 68707
difficult 0.532 2515
more_challenging 0.531 31394
it_be_an_interesting 0.520 98300
be_quite_a 0.513 25697
be_very_difficult 0.512 37607
the_most_difficult 0.511 35489
an_exciting 0.507 14578
a_tricky 0.506 79167
be_the_most_difficult 0.504 91080
be_not_easy 0.504 17254
it_be_a_tough 0.502 93393
be_extremely_difficult 0.501 97037
very_difficult 0.497 34974
be_an_extremely 0.497 56101
daunting 0.496 43508
be_an_amazing 0.493 27733