| Similarity | Rank | |
|---|---|---|
| migration | 0.875 | 7682 |
| migrating | 0.793 | 21649 |
| Migrating | 0.737 | 93999 |
| Migration | 0.701 | 23482 |
| migrate | 0.701 | 15831 |
| deltas | 0.658 | 90802 |
| extinctions | 0.651 | 71406 |
| migratory | 0.646 | 26999 |
| migrated | 0.634 | 20171 |
| wintering | 0.623 | 54450 |
| incursions | 0.620 | 54133 |
| aggregations | 0.612 | 91257 |
| colonization | 0.611 | 28667 |
| Pleistocene | 0.611 | 71860 |
| invasions | 0.608 | 33804 |
| populations | 0.601 | 5712 |
| waterbirds | 0.600 | 98244 |
| deployments | 0.600 | 23829 |
| colonisation | 0.595 | 64815 |
| shorebirds | 0.587 | 76854 |
| migrates | 0.586 | 75510 |
| dispersal | 0.584 | 40213 |
| extinction | 0.583 | 15835 |
| speciation | 0.583 | 76081 |
| provisioning | 0.583 | 32425 |