| 100% | NDA | 3 | Contract to protect secrets: Abbr. |
| 73% | NDA | 3 | Document signed to protect secrets: Abbr. |
| 72% | NDA | 3 | It's signed to protect secrets: Abbr. |
| 65% | NDA | 3 | Document signed to protect secrets (Abbr.) |
| 58% | NDA | 3 | Document intended to protect company secrets (Abbr.) |
| 56% | NDA | 3 | Doc signed to protect secrets |
| 53% | NDA | 3 | Document to protect confidentiality: Abbr. |
| 52% | NDA | 3 | Secret contract: Abbr. |
| 51% | NDA | 3 | Doc meant to protect trade secrets |
| 51% | NDA | 3 | Document to protect confidential info: Abbr. |
| 50% | ACLU | 4 | Group devoted to protecting peoples' rights: Abbr. |
| 49% | ACLU | 4 | Group devoted to protecting peoples' constitutional rights: Abbr. |
| 48% | ACLU | 4 | Group fighting since 1920 to protect personal freedoms: Abbr. |
| 45% | ARP | 3 | British organization set up before WWII to protect citizens against air strikes : Abbr. |
| 43% | ACLU | 4 | Nonprofit organization whose mission is to protect the rights of the people of America: Abbr. |
| 42% | NDA | 3 | Document intended to protect confidential information (Abbr.) |
| 42% | NDAS | 4 | Secret-protecting documents: Abbr. |
| 41% | NDA | 3 | Document intended to protect confidentiality (Abbr.) |
| 41% | NDAS | 4 | Secrecy-protecting contracts: Abbr. |
| 40% | NDA | 3 | Trade secrets-protecting document: Abbr. |
| 38% | INSULATES | 9 | Separates to protect |
| 37% | DEFEND | 6 | To protect your computer against malware |
| 37% | LAMINATE | 8 | To protect with a plastic cover |
| 37% | LYSOL | 5 | "Disinfect to Protect" brand |
| 37% | GUARD | 5 | Watch over to protect |
| 37% | LIEFOR | 6 | Commit perjury to protect |
| 37% | ENCODE | 6 | Use cryptography to protect |
| 37% | SSNS | 4 | Figures to protect, briefly |
| 37% | MOTHBALLS | 9 | Pellets to protect clothes |
| 36% | CONSERVE | 8 | To protect something from harm or destruction |