| Similarity | Rank | |
|---|---|---|
| 1980 | 0.801 | 2404 |
| 1970 | 0.777 | 2583 |
| year | 0.760 | 72 |
| 1960 | 0.732 | 2807 |
| century | 0.726 | 502 |
| mid-1950s | 0.713 | 24366 |
| 1950 | 0.711 | 3691 |
| mid-1960 | 0.698 | 49947 |
| 1990 | 0.680 | 5663 |
| twentieth | 0.672 | 3963 |
| mid-1980 | 0.672 | 11219 |
| mid-to-late | 0.672 | 71501 |
| nineteenth | 0.672 | 2686 |
| 1940 | 0.666 | 7398 |
| interwar | 0.664 | 19545 |
| mid-1960s | 0.662 | 19473 |
| era | 0.658 | 3452 |
| past | 0.655 | 444 |
| 1930 | 0.655 | 4100 |
| turn-around | 0.655 | 59639 |
| mid-1970 | 0.653 | 12406 |
| 1920 | 0.649 | 5459 |
| quarter-century | 0.644 | 53467 |
| 1800 | 0.644 | 33369 |
| retrenchment | 0.640 | 28727 |