| Similarity | Rank | |
|---|---|---|
| difficult | 0.782 | 2515 |
| a_tricky | 0.748 | 79167 |
| very_difficult | 0.745 | 34974 |
| be_a_tough | 0.698 | 36164 |
| the_most_difficult | 0.682 | 35489 |
| extremely_difficult | 0.671 | 93625 |
| be_a_challenging | 0.663 | 67849 |
| a_challenging | 0.654 | 34700 |
| be_very_difficult | 0.650 | 37607 |
| frustrating | 0.642 | 15978 |
| tricky | 0.641 | 23559 |
| it_be_a_tough | 0.633 | 93393 |
| be_the_most_difficult | 0.628 | 91080 |
| a_tough | 0.628 | 26323 |
| a_complicated | 0.625 | 52032 |
| daunting | 0.620 | 43508 |
| more_difficult | 0.610 | 14322 |
| the_most_challenging | 0.608 | 54484 |
| challenging | 0.608 | 6371 |
| be_not_easy | 0.607 | 17254 |
| arduous | 0.595 | 48005 |
| be_extremely_difficult | 0.592 | 97037 |
| more_challenging | 0.579 | 31394 |
| be_tough | 0.571 | 11759 |
| stressful | 0.567 | 20694 |