Secrecy and Concealment

• abscond
• alias
• alphanumeric
• ambuscade
• ambush
• arcanum
• backdoor
• background
• backstage
• backstairs
• beard
• defog
• behind-the scenes
• between you and me
• black market
• blind
• blow one’s cover
• blow the whistle on
• blur
• booby trap
• bug
• burke
• bury
• bushwhack
• buzz
• cache
• camisado
• camouflage
• carapace
• cipher
• clandestine
• classified
• cloak
• cloud
• code
• code name
• code word
• conceal
• concealment
• confidence
• contraband
• cover
• cover one’s tracks
• covert
• coverup
• cryptic
• cryptography
• decipher
• deconde
• decoy
• disguise
• dissemble
• dissimulate
• divulge
• doggo
• eavesdrop
• expose
• expose
• fine print
• foxhole
• fugitive
• furtive
• get away with
• get out
• grapevine
• hide
• hideaway
• hideout
• hole up
• hugger-mugger
• hush-hush
• hush-up
• imposture
• incognito
• indiscretion
• informant
• informer
• innuendo
• inside information
• insinuation
• intelligence
• in the dark
• in the know
• leak
• lie low
• listen in
• low-profile
• lurk
• mask
• masquerade
• mum
• nose out
• obfuscate
• oblique
• obscurantism
• obscure
• on the lam
• palimpsest
• password
• pig in a poke
• private
• pry
• pussyfoot
• recess
• reconnaissance
• reveal
• rifle
• rumor
• rumormonger
• safe house
• score
• screen
• second-story man
• secrecy
• secret
• secretive
• shadow
• shirk
• sing
• skulk
• slyboots
• smell a rat
• smoke screen
• sneak
• sneak thief
• snoop
• spill
• spill the beams
• spy
• squeal
• Star Chamber
• stash
• steal
• stealth
• stonewall
• stool pigeon
• stowaway
• sub rose
• subterfuge
• subterranean
• suppress
• surreptitious
• surveillance
• tail
• tap
• tattle
• tittle-tattle
• top-secret
• track
• trail
• ulterior
• undercover
• underhanded
• under-the-counter
• under-the table
• under wraps
• unearth
• unmask
• up one’s sleeve
• veil
• wizard
• watch
• waylay
• weasel
• whistle-blower
• wind
• wiretap
• wise
• wriggle out