| Similarity | Rank | |
|---|---|---|
| the_most_difficult | 0.808 | 35489 |
| be_the_most_difficult | 0.713 | 91080 |
| the_most_complex | 0.688 | 51425 |
| the_most_rewarding | 0.685 | 96855 |
| challenging | 0.681 | 6371 |
| a_challenging | 0.624 | 34700 |
| the_most_critical | 0.618 | 50569 |
| the_great_challenge | 0.614 | 32862 |
| be_a_challenging | 0.613 | 67849 |
| a_difficult | 0.608 | 12053 |
| more_challenging | 0.604 | 31394 |
| difficult | 0.597 | 2515 |
| the_most_fun | 0.587 | 79793 |
| most_enjoyable | 0.576 | 82323 |
| the_big_challenge | 0.575 | 19695 |
| the_most_interesting | 0.574 | 21878 |
| extremely_difficult | 0.573 | 93625 |
| the_most_exciting | 0.566 | 31212 |
| great_challenge | 0.564 | 59535 |
| very_difficult | 0.553 | 34974 |
| the_most_unique | 0.544 | 74335 |
| the_major_challenge | 0.542 | 66525 |
| tough | 0.536 | 4367 |
| be_a_tough | 0.530 | 36164 |
| probably_one_of | 0.529 | 72637 |