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top secret

see definition of top secret
  • nounhighly classified
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Synonyms for top secret

noun highly classified
  • classified
  • hush-hush
  • supersecret
  • under security restrictions
  • under wraps

More words related to top secret

privileged

adjective. confidential, secret
  • exceptional
  • for eyes only
  • inside
  • not for publication
  • off the record
  • on the QT
  • privy
  • special
  • top secret
  • under one's hat
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.