| Similarity | Rank | |
|---|---|---|
| PADI | 0.906 | 32276 |
| Scuba | 0.840 | 30810 |
| Diver | 0.795 | 37391 |
| Diving | 0.788 | 23120 |
| Dive | 0.787 | 22291 |
| SCUBA | 0.771 | 62864 |
| Divers | 0.768 | 41818 |
| diver | 0.764 | 22641 |
| Nitrox | 0.756 | 93311 |
| scuba | 0.742 | 15689 |
| Instructor | 0.736 | 15178 |
| Instructors | 0.728 | 28983 |
| dives | 0.726 | 18962 |
| diving | 0.724 | 6504 |
| liveaboard | 0.718 | 97949 |
| dive | 0.718 | 6104 |
| Snorkeling | 0.700 | 65900 |
| Snorkel | 0.698 | 86996 |
| Lifeguard | 0.688 | 95913 |
| snorkelers | 0.679 | 91250 |
| RYA | 0.679 | 72716 |
| divers | 0.677 | 14035 |
| instructor | 0.668 | 5773 |
| Kayaking | 0.668 | 52599 |
| snorkelling | 0.664 | 40577 |