| 100% | NSC | 3 | Defense advisory group: Abbr. |
| 93% | NSC | 3 | Top-level defense advisory group: Abbr. |
| 70% | NSC | 3 | Presidential advisory group: Abbr. |
| 64% | NSC | 3 | Advisory group to the U.S. President: Abbr. |
| 62% | NATO | 4 | Defense group since 1949: Abbr. |
| 62% | NATO | 4 | Peacekeeping defense group: Abbr. |
| 61% | NATO | 4 | Defense group based in Brussels: Abbr. |
| 61% | NATO | 4 | Defense group formed in 1949: Abbr. |
| 61% | NATO | 4 | Defense group headquartered in Brussels: Abbr. |
| 60% | NSC | 3 | White House advisory group responsible for foreign policy: Abbr. |
| 60% | NATO | 4 | Defense group with its own alphabet: Abbr. |
| 59% | NATO | 4 | International defense alliance group: Abbr. |
| 59% | NSA | 3 | Secretive Defense Department group: Abbr. |
| 57% | NATO | 4 | International defense group founded in 1949: Abbr. |
| 57% | NATO | 4 | International defense group based in Brussels: Abbr. |
| 57% | NATO | 4 | International defense group formed in 1949: Abbr. |
| 57% | NSA | 3 | Defense Department code-cracking group: Abbr. |
| 57% | ACLU | 4 | Human rights defense group: Abbr. |
| 57% | NATO | 4 | Brussels-based defense group: Abbr. |
| 57% | NSC | 3 | White House advisory group (Abbr.) |
| 56% | NSA | 3 | Defense Department group that collects data for foreign intelligence: Abbr. |
| 55% | NATO | 4 | Defense group containing the US, Canada, and most European nations: Abbr. |
| 55% | NSA | 3 | Secretive Department of Defense group: Abbr. |
| 54% | NSA | 3 | Defense Department group whose surveillance activities were revealed by Edward Snowden: Abbr. |
| 54% | NATO | 4 | International defense group that started after World War II: Abbr. |
| 54% | ACLU | 4 | Group with a Drag Defense Fund: Abbr. |
| 53% | NAACP | 5 | Civil rights group with a Legal Defense and Educational Fund: Abbr. |
| 52% | NATO | 4 | Transcontinental defense group (Abbr.) |
| 52% | NATO | 4 | Multinational defense group (Abbr.) |
| 50% | BOARD | 5 | Advisory group |