| Similarity | Rank | |
|---|---|---|
| a_tough | 0.806 | 26323 |
| be_tough | 0.747 | 11759 |
| be_a_tough | 0.683 | 36164 |
| hard | 0.643 | 1452 |
| harsh | 0.607 | 10084 |
| toughen | 0.601 | 87538 |
| the_most_difficult | 0.593 | 35489 |
| rough | 0.591 | 7325 |
| tricky | 0.585 | 23559 |
| difficult | 0.585 | 2515 |
| it_be_a_tough | 0.579 | 93393 |
| stiff | 0.573 | 16121 |
| very_hard | 0.567 | 41193 |
| a_difficult | 0.556 | 12053 |
| unforgive | 0.554 | 66554 |
| really_hard | 0.540 | 64966 |
| the_most_challenging | 0.536 | 54484 |
| unyielding | 0.536 | 87458 |
| challenging | 0.534 | 6371 |
| grueling | 0.533 | 94119 |
| gritty | 0.532 | 33205 |
| more_challenging | 0.532 | 31394 |
| hard_as | 0.525 | 79740 |
| soft | 0.524 | 3244 |
| arduous | 0.522 | 48005 |