Supersecret [noun]

● Classified

● Hush-hush

● Under wraps

● Under security restrictions

● Supersecret

● Secretive

● Secret

● Clandestine

● Covert

● Compartmented

● Stealthy

● Shadowy

● Mysterious

● Counterterrorist

● Operative

● Furtive

● Cyber

● Crypto

● Subterranean

● Cryptologic

● Mossad

● Deniable

● Weaponized

● Multiheaded

● Nefarious

● Firewalled

● Unsecret

● Antigravity

● Backstair

● Mercenary

● Creepy

● Open secret

● Paranoid

● Secretist

● Clancular

● Cabalistic

● Telic

● In secret

● Swank

● Geeky

● Interdimensional

● Subbasement

● Subversive

● Irangate

● Ciphered

● Tentacled

● Hack

● Closeted

● Nuke

● Tentacular

● Praetorian

● Clancularly

● Unattributable

● Cybernetic

● Haganah

● Orwellian

● Schizoid

● Nerdy

● Spiffy

● Batlike

● Whig

● Wormhole

● Quasi

● Cyborg

● Swanky

● Slimier

● Recon

● Gossipy

● Encrypted

● Outed

● Stenographic

● Discreet

● Mephistophelean

● Knavish

● Extraterrestrial

● Machiavellian

● Ravening

● Vulpine

● Tasking

● Cryptozoological

● Malevolent

● Cloistered

● Megalomanic

● Freaky

● Dishy

● Unclassified

● Amnesiac

● Evilest

● Brainy

● Paranoic

● In petto

● Intelligence agent

● Black operation

● Spyism

● Undercover

● International intelligence agency

● National security agency

● Obreptitious

● Intelligence agency

● Confidential

● Intelligence community

● Tectly

● Central intelligence agency

● Secret intelligence service