| Similarity | Rank | |
|---|---|---|
| secrets | 0.834 | 5681 |
| top-secret | 0.733 | 62418 |
| secrecy | 0.715 | 16735 |
| spies | 0.702 | 22486 |
| Secret | 0.684 | 7185 |
| clandestine | 0.675 | 31163 |
| hidden | 0.673 | 2889 |
| best-kept | 0.644 | 84251 |
| secretive | 0.644 | 25159 |
| secretly | 0.643 | 11109 |
| ruse | 0.639 | 41008 |
| subterfuge | 0.638 | 60928 |
| mystery | 0.633 | 4662 |
| KGB | 0.626 | 38238 |
| privy | 0.625 | 29738 |
| mysterious | 0.624 | 6388 |
| divulging | 0.622 | 77782 |
| insider | 0.620 | 15679 |
| hiding | 0.620 | 6263 |
| espionage | 0.612 | 26544 |
| undercover | 0.606 | 20065 |
| covert | 0.605 | 19630 |
| spying | 0.603 | 20954 |
| magic | 0.601 | 2770 |
| concealing | 0.598 | 33146 |