| Similarity | Rank | |
|---|---|---|
| pre-paid | 0.880 | 38084 |
| pre-payment | 0.872 | 82930 |
| prepay | 0.868 | 62384 |
| payment | 0.792 | 1435 |
| prepaid | 0.765 | 13410 |
| fee | 0.762 | 1930 |
| pay | 0.748 | 399 |
| refund | 0.741 | 6932 |
| pay-as-you-go | 0.738 | 66131 |
| payments | 0.738 | 2184 |
| flat-rate | 0.736 | 95918 |
| refundable | 0.736 | 32957 |
| non-refundable | 0.735 | 30278 |
| refunds | 0.733 | 18088 |
| surcharge | 0.732 | 27588 |
| Prepaid | 0.728 | 37363 |
| prepayment | 0.724 | 38517 |
| pre-book | 0.723 | 93598 |
| nonrefundable | 0.719 | 85858 |
| top-up | 0.718 | 69567 |
| refunded | 0.717 | 24415 |
| pro-rated | 0.717 | 85976 |
| fees | 0.716 | 1896 |
| debit | 0.715 | 9639 |
| pre-booked | 0.714 | 84696 |