| 100% | ISO | 3 | International Organization for Standardization |
| 59% | USOC | 4 | American organization for international athletic competition: Abbr. |
| 57% | ILO | 3 | Abbreviation for International Labor Organization |
| 57% | ILO | 3 | Abbreviation for International Labour Organization |
| 52% | ARAL | 4 | International Fund for Saving the ___ Sea (ecological organization based in Central Asia) |
| 51% | FIFA | 4 | Organization that is responsible for major international soccer tournaments around the world: Abbr. |
| 49% | ANIMAL | 6 | International Fund For ___ Welfare, organization supported by Leonardo DiCaprio that works towards wildlife conservation |
| 49% | INT | 3 | Internet domain for an international organization |
| 48% | UNITEDNATIONS | 13 | International organization |
| 47% | POL | 3 | "Inter" suffix for an international organization |
| 47% | MENSA | 5 | Organization for geniuses |
| 47% | AARP | 4 | Organization for seniors |
| 46% | NBA | 3 | Organization for hoopsters: Abbr. |
| 46% | AARP | 4 | Organization for people 50+ |
| 46% | ABA | 3 | Organization for attorneys (Abbr.) |
| 46% | MENSA | 5 | Organization for the supersmart |
| 46% | AMA | 3 | Organization for physicians: Abbr. |
| 46% | APA | 3 | Organization for therapists: Abbr. |
| 46% | AMA | 3 | Organization for doctors: Abbr. |
| 46% | AARP | 4 | Organization for seniors: Abbr. |
| 46% | ELDERHOSTEL | 11 | Organization for senior travelers |
| 46% | ABA | 3 | Organization for attorneys: Abbr. |
| 46% | AAA | 3 | Organization for motorists: Abbr. |
| 46% | WBA | 3 | Organization for prizefighters: Abbr. |
| 46% | NEA | 3 | Organization for educators: Abbr. |
| 46% | APA | 3 | Organization for shrinks: Abbr. |
| 46% | AMA | 3 | Organization for surgeons: Abbr. |
| 46% | AMA | 3 | Organization for caregivers: Abbr. |
| 46% | AARP | 4 | Organization for 48-Across |
| 46% | NEA | 3 | Organization for teachers: Abbr. |