All hole-and-corner synonyms

adj hole-and-corner

• secret — done, made, or conducted without the knowledge of others: secret negotiations.
• covert — Covert activities or situations are secret or hidden.
• furtive — taken, done, used, etc., surreptitiously or by stealth; secret: a furtive glance.
• hush-hush — highly secret or confidential: a hush-hush political investigation.
• unauthorized — lacking permission; unsanctioned: unauthorized access.
• clandestine — Something that is clandestine is hidden or kept secret, often because it is illegal.
• fraudulent — characterized by, involving, or proceeding from fraud, as actions, enterprise, methods, or gains: a fraudulent scheme to evade taxes.
• hidden — concealed; obscure; covert: hidden meaning; hidden hostility.
• private — privacy
• sly — cunning or wily: sly as a fox.
• stealthy — done, characterized, or acting by stealth; furtive: stealthy footsteps.
• under wraps — to enclose in something wound or folded about (often followed by up): She wrapped her head in a scarf.
• undercover — working or done out of public sight; secret: an undercover investigation.
• underhand — not open and aboveboard; secret and crafty or dishonorable: an underhand deal with the chief of police.
• veiled — having a veil: a veiled hat.
• sneaking — acting in a furtive or underhand way.
• on the qt — on the q.t., stealthily; secretly: to meet someone on the q.t.
• on the sly — cunning or wily: sly as a fox.
• skulking — to lie or keep in hiding, as for some evil reason: The thief skulked in the shadows.
• slinking — to move or go in a furtive, abject manner, as from fear, cowardice, or shame.
• under-the-table — transacted in secret or in an underhanded manner.
• concealed — to hide; withdraw or remove from observation; cover or keep from sight: He concealed the gun under his coat.
• confidential — Information that is confidential is meant to be kept secret or private.
• creep — When people or animals creep somewhere, they move quietly and slowly.
• incognito — having one's identity concealed, as under an assumed name, especially to avoid notice or formal attentions.
• intelligence — capacity for learning, reasoning, understanding, and similar forms of mental activity; aptitude in grasping truths, relationships, facts, meanings, etc.
• stealth — secret, clandestine, or surreptitious procedure.
• surreptitious — obtained, done, made, etc., by stealth; secret or unauthorized; clandestine: a surreptitious glance.
• underground — beneath the surface of the ground: traveling underground by subway.
• underneath — below the surface or level of; directly or vertically beneath; at or on the bottom of.