| Similarity | Rank | |
|---|---|---|
| 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 |