| Similarity | Rank | |
|---|---|---|
| sailing | 0.774 | 4683 |
| windsurfing | 0.773 | 12802 |
| dinghy | 0.772 | 9801 |
| sub-aqua | 0.762 | 60687 |
| windsurfer | 0.761 | 21314 |
| diving | 0.758 | 9708 |
| hang-gliding | 0.752 | 49528 |
| orienteering | 0.751 | 42052 |
| pedaloe | 0.750 | 72753 |
| caving | 0.749 | 45315 |
| rowing | 0.744 | 11350 |
| raft | 0.743 | 9288 |
| horse-riding | 0.743 | 26536 |
| waterski | 0.738 | 55596 |
| abseil | 0.735 | 15167 |
| wind-surfing | 0.733 | 42197 |
| white-water | 0.733 | 69734 |
| scuba | 0.731 | 23477 |
| biking | 0.730 | 28780 |
| pedalo | 0.730 | 67578 |
| pony-trekking | 0.727 | 48501 |
| snorkelling | 0.726 | 34841 |
| paragliding | 0.726 | 46810 |
| scuba-diving | 0.726 | 93607 |
| parascending | 0.724 | 87243 |