| Similarity | Rank | |
|---|---|---|
| since_9_/_[number] | 0.773 | 64126 |
| post-9_/_[number] | 0.769 | 87391 |
| the_9_/_[number]_attack | 0.753 | 41728 |
| after_September_[number] | 0.697 | 75057 |
| the_War_on_Terror | 0.656 | 63478 |
| on_9_/_[number] | 0.652 | 46096 |
| 9_/_[number] | 0.634 | 7060 |
| the_war_on_terror | 0.626 | 47377 |
| terrorist_attack | 0.614 | 15398 |
| Bin_Laden | 0.589 | 39834 |
| the_World_Trade_Center | 0.578 | 43422 |
| Al_Qaeda | 0.573 | 20556 |
| terrorism | 0.571 | 3838 |
| Osama_bin_Laden | 0.563 | 29989 |
| counterterrorism | 0.558 | 58849 |
| bin_Laden | 0.554 | 33593 |
| al_Qaeda | 0.548 | 26461 |
| the_invasion_of_Iraq | 0.545 | 59891 |
| the_Iraq_war | 0.544 | 36456 |
| Al-Qaeda | 0.543 | 34126 |
| al-Qaida | 0.542 | 53789 |
| the_war_in_Iraq | 0.542 | 31207 |
| the_Patriot_Act | 0.540 | 65917 |
| the_FBI | 0.540 | 8429 |
| terror_attack | 0.540 | 43895 |