| Similarity | Rank | |
|---|---|---|
| be_extremely_difficult | 0.834 | 97037 |
| difficult | 0.772 | 2515 |
| very_difficult | 0.769 | 34974 |
| be_not_easy | 0.747 | 17254 |
| be_very_hard | 0.739 | 91214 |
| extremely_difficult | 0.696 | 93625 |
| it_be_difficult | 0.689 | 31149 |
| it_be_very_difficult | 0.675 | 71675 |
| can_be_difficult | 0.672 | 30674 |
| be_tricky | 0.670 | 48836 |
| it_be_very_difficult_to | 0.660 | 29790 |
| be_the_most_difficult | 0.658 | 91080 |
| ,_if_not_impossible | 0.658 | 78666 |
| be_tough | 0.650 | 11759 |
| a_difficult | 0.650 | 12053 |
| be_not_an_easy_task | 0.648 | 79512 |
| it_be_not_easy | 0.636 | 29647 |
| it_be_very_hard_to | 0.632 | 86037 |
| be_difficult_for | 0.632 | 52554 |
| be_difficult_to | 0.631 | 37814 |
| be_impossible | 0.619 | 18147 |
| be_not_always_easy | 0.615 | 89460 |
| more_difficult | 0.609 | 14322 |
| be_hard_to | 0.608 | 23656 |
| it_be_difficult_to | 0.601 | 12556 |