| Similarity | Rank | |
|---|---|---|
| clandestine | 0.838 | 31163 |
| covertly | 0.820 | 45621 |
| counterintelligence | 0.800 | 97942 |
| espionage | 0.777 | 26544 |
| CIA's | 0.776 | 49798 |
| CIA | 0.766 | 9037 |
| spying | 0.761 | 20954 |
| C.I.A. | 0.755 | 70543 |
| surreptitious | 0.746 | 79711 |
| spy | 0.740 | 9669 |
| anti-terrorist | 0.740 | 93721 |
| subterfuge | 0.739 | 60928 |
| counter-terrorism | 0.738 | 54278 |
| wiretapping | 0.734 | 69167 |
| counterterrorism | 0.727 | 46179 |
| surveillance | 0.726 | 7266 |
| operatives | 0.711 | 26245 |
| clandestinely | 0.711 | 95782 |
| MI6 | 0.704 | 65381 |
| wiretaps | 0.702 | 88981 |
| assassinations | 0.699 | 42499 |
| undercover | 0.696 | 20065 |
| nefarious | 0.696 | 33621 |
| interdiction | 0.696 | 77518 |
| MI5 | 0.694 | 68105 |