Confidentiality contract initials found in this puzzle's four longest answers

• Contract to protect secrets: Abbr
• Confidentiality contract initials
• Dentists' org
• Leak preventer, of a sort: Abbr
• Contract to protect trade secrets: Abbr
• Tooth specialists' gp.
• Document to keep co. secrets
• Doc. to protect company secrets

Wikipedia Word definitions in Wikipedia
NDA is an abbreviation that may refer to: National Democratic Alliance (disambiguation) National Dance Association , the oldest American organization for dance education National Defence Academy , a military academy in India National Defence Act , the primary ...