| Similarity | Rank | |
|---|---|---|
| vfr | 0.822 | 49643 |
| autopilot | 0.790 | 41583 |
| ils | 0.777 | 45905 |
| short-field | 0.775 | 99331 |
| single-engine | 0.767 | 82475 |
| qnh | 0.765 | 80917 |
| twin-engine | 0.762 | 92072 |
| awacs | 0.744 | 70830 |
| piston-engined | 0.743 | 73753 |
| xb-70 | 0.743 | 68782 |
| stol | 0.743 | 85731 |
| refuelling | 0.742 | 88548 |
| jetfoil | 0.741 | 89468 |
| naa | 0.740 | 79038 |
| horsa | 0.740 | 79157 |
| localiser | 0.739 | 43724 |
| electrically-powered | 0.738 | 88680 |
| cloudbase | 0.734 | 99372 |
| transponder | 0.734 | 46530 |
| outbound | 0.732 | 22143 |
| high-altitude | 0.730 | 49883 |
| convair | 0.729 | 74971 |
| pressurisation | 0.729 | 80767 |
| takeoff | 0.729 | 50521 |
| dc-8 | 0.728 | 88685 |