One who betrays

• betrayer

  1. A double-crosser.
  2. Someone who betrays, or reveals confidential information; a squealer or informer.

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  1. A double-crosser.
  2. Someone who betrays, or reveals confidential information; a squealer or informer.

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• double-crosser

  1. One who double-crosses.

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  1. One who double-crosses.

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• judas

  1. (Bible, person, proper) Judas Iscariot, the disciple who betrayed Jesus: Matt. 26:14, 48
  2. (Bible, person, proper) A brother of Jesus and James: Mark 6:3; Matt. 13:55
  3. A traitor or betrayer

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  1. (Bible, person, proper) Judas Iscariot, the disciple who betrayed Jesus: Matt. 26:14, 48
  2. (Bible, person, proper) A brother of Jesus and James: Mark 6:3; Matt. 13:55
  3. A traitor or betrayer

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• traitor

  1. A person who betrays his or her country, cause, friends, etc.; one guilty of treason or treachery

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  1. A person who betrays his or her country, cause, friends, etc.; one guilty of treason or treachery

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One who gives incriminating information about others

• informant

  1. A native speaker of a language whose pronunciations, usages, etc. are studied and recorded by linguists
  2. One that gives information.
  3. A person who gives, or serves as a source of, information

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  1. A native speaker of a language whose pronunciations, usages, etc. are studied and recorded by linguists
  2. One that gives information.
  3. A person who gives, or serves as a source of, information

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• informer

  1. An informant, especially one who informs against others for compensation.
  2. A person who secretly accuses, or gives evidence against, another, often for a reward

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  1. An informant, especially one who informs against others for compensation.
  2. A person who secretly accuses, or gives evidence against, another, often for a reward

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• tattler

  1. A device fitted to a vehicle to measure mileage etc.
  2. One who tattles (notifies authorities of illicit behavi) or is inclined to do so; a tattletale.
  3. A person who tattles; gossip or informer

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  1. A device fitted to a vehicle to measure mileage etc.
  2. One who tattles (notifies authorities of illicit behavi) or is inclined to do so; a tattletale.
  3. A person who tattles; gossip or informer

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• tattletale

  1. One who tattles (reports others' wrongdoings), often by a child seeking attention.
  2. An informer or talebearer

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  1. One who tattles (reports others' wrongdoings), often by a child seeking attention.
  2. An informer or talebearer

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• tipster

  1. Someone who makes a living by studying the form of racehorses and selling advice on wagers to other punters. [from later 19th c.]
  2. One who sells tips or information, as to bettors or speculators.
  3. A person who gives a tip, as to the police

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  1. Someone who makes a living by studying the form of racehorses and selling advice on wagers to other punters. [from later 19th c.]
  2. One who sells tips or information, as to bettors or speculators.
  3. A person who gives a tip, as to the police

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• fink

  1. (Chiefly US, slang) Someone who betrays a trust.
  2. A contemptible person.
  3. An informer

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  1. (Chiefly US, slang) Someone who betrays a trust.
  2. A contemptible person.
  3. An informer

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• snitch

  1. A thief.
  2. An informer.

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  1. A thief.
  2. An informer.

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• snitcher

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• squealer

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• stoolie

  1. (Slang) A stool pigeon.

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  1. (Slang) A stool pigeon.

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• stool pigeon

  1. A pigeon used as a decoy.
  2. (Informal) A spy or informer, esp. for the police
  3. (Slang) A person acting as a decoy or as an informer, especially one who is a spy for the police.

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  1. A pigeon used as a decoy.
  2. (Informal) A spy or informer, esp. for the police
  3. (Slang) A person acting as a decoy or as an informer, especially one who is a spy for the police.

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A person who has defected

• apostate

  1. A person guilty of apostasy
  2. One who has abandoned one's religious faith, a political party, one's principles, or a cause.

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  1. A person guilty of apostasy
  2. One who has abandoned one's religious faith, a political party, one's principles, or a cause.

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• defector

  1. One who defects.

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  1. One who defects.

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• deserter

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• recreant

  1. A coward; craven
  2. (Archaic) A coward.
  3. A disloyal person; traitor

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  1. A coward; craven
  2. (Archaic) A coward.
  3. A disloyal person; traitor

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• renegade

  1. An outlaw; a rebel.
  2. One who rejects a religion, cause, allegiance, or group for another; a deserter.
  3. A person who abandons a party, movement, etc. and goes over to the other side; traitor; turncoat

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  1. An outlaw; a rebel.
  2. One who rejects a religion, cause, allegiance, or group for another; a deserter.
  3. A person who abandons a party, movement, etc. and goes over to the other side; traitor; turncoat

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• runagate

  1. A runaway; fugitive or deserter
  2. A person who drifts or wanders about; vagabond
  3. A renegade or deserter.

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  1. A runaway; fugitive or deserter
  2. A person who drifts or wanders about; vagabond
  3. A renegade or deserter.

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• tergiversator

  1. One who tergiversates

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  1. One who tergiversates

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• turncoat

  1. A traitor; one who turns against a previous affiliation or allegiance.
  2. A person who goes over to the opposite side or party; traitor

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  1. A traitor; one who turns against a previous affiliation or allegiance.
  2. A person who goes over to the opposite side or party; traitor

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To abandon one's cause or party usually to join another

• apostatize

  1. To abandon one's religious faith, a political party, one's principles, or a cause.
  2. To become an apostate
  3. To give up or renounce one's position or belief.

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  1. To abandon one's religious faith, a political party, one's principles, or a cause.
  2. To become an apostate
  3. To give up or renounce one's position or belief.

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• defect

  1. To abandon a position or association, often to join an opposing group:
  2. To forsake a party or cause, esp. so as to join the opposition
  3. To disown allegiance to one's country and take up residence in another:

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  1. To abandon a position or association, often to join an opposing group:
  2. To forsake a party or cause, esp. so as to join the opposition
  3. To disown allegiance to one's country and take up residence in another:

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• desert

  1. To forsake (someone or something that one ought not to leave); abandon
  2. To withdraw from, especially in spite of a responsibility or duty; forsake:
  3. To forsake one's duty or post, especially to be absent without leave from the armed forces with no intention of returning.

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  1. To forsake (someone or something that one ought not to leave); abandon
  2. To withdraw from, especially in spite of a responsibility or duty; forsake:
  3. To forsake one's duty or post, especially to be absent without leave from the armed forces with no intention of returning.

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• renegade

  1. To become a deserter or an outlaw.

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  1. To become a deserter or an outlaw.

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• tergiversate

  1. To use evasions or subterfuge; equivocate
  2. To desert a cause, party, etc.; become a renegade; apostatize
  3. To change sides; apostatize.

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  1. To use evasions or subterfuge; equivocate
  2. To desert a cause, party, etc.; become a renegade; apostatize
  3. To change sides; apostatize.

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• turn

  1. To reverse one's or its course; start to move, go, etc. in the opposite direction
  2. To change the position of so that the underside becomes the upper side:
  3. To divert or deflect:

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  1. To reverse one's or its course; start to move, go, etc. in the opposite direction
  2. To change the position of so that the underside becomes the upper side:
  3. To divert or deflect:

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To be treacherous to.

• Also used with on: betray

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• double-cross

  1. To betray or go back on
  2. To betray by acting in contradiction to a prior agreement.
  3. (Informal) To betray (a person) by doing the opposite of, or intentionally failing to do, what one has promised

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  1. To betray or go back on
  2. To betray by acting in contradiction to a prior agreement.
  3. (Informal) To betray (a person) by doing the opposite of, or intentionally failing to do, what one has promised

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• sell out

  1. (Idiomatic) To abandon or betray one's supporters or principles to seek profit or other personal advantage.
  2. To sell all of a product that is in stock.

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  1. (Idiomatic) To abandon or betray one's supporters or principles to seek profit or other personal advantage.
  2. To sell all of a product that is in stock.

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To give incriminating information about others, especially to the authorities

• inform

  1. (--- Obs.) To give form to
  2. To impart information to; make aware of something:
  3. To give knowledge of something to; tell; acquaint with a fact, etc.

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  1. (--- Obs.) To give form to
  2. To impart information to; make aware of something:
  3. To give knowledge of something to; tell; acquaint with a fact, etc.

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• talk

  1. To convey one's thoughts in a way other than by spoken words:
  2. To utter or pronounce words:
  3. To speak about or discuss (something) or give expression to (something):

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  1. To convey one's thoughts in a way other than by spoken words:
  2. To utter or pronounce words:
  3. To speak about or discuss (something) or give expression to (something):

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• tattle

  1. To reveal (something about someone) to another, as through gossiping.
  2. To reveal other people's secrets; tell tales
  3. To talk idly; chatter; gossip

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  1. To reveal (something about someone) to another, as through gossiping.
  2. To reveal other people's secrets; tell tales
  3. To talk idly; chatter; gossip

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• tip

  1. To give a tip to:
  2. To give as a tip:
  3. To cover the tip or tips of (with something)

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  1. To give a tip to:
  2. To give as a tip:
  3. To cover the tip or tips of (with something)

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• fink

  1. To inform (on)
  2. (Chiefly US, slang) To betray a trust.
  3. To withhold promised support or participation:

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  1. To inform (on)
  2. (Chiefly US, slang) To betray a trust.
  3. To withhold promised support or participation:

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• sing

  1. To proclaim or extol something in verse.
  2. (Slang) To give information or evidence against someone.
  3. (Music) To produce the musical sound of:

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  1. To proclaim or extol something in verse.
  2. (Slang) To give information or evidence against someone.
  3. (Music) To produce the musical sound of:

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• snitch

  1. To be an informer; tattle (on)
  2. To act as an informer:
  3. To steal (something, usually something of little value); pilfer:

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  1. To be an informer; tattle (on)
  2. To act as an informer:
  3. To steal (something, usually something of little value); pilfer:

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• squeal

  1. (Slang) To turn informer; betray an accomplice or secret.
  2. To give forth a loud shrill cry or sound.
  3. To give sensitive information about someone to a third party; to rat on someone.

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  1. (Slang) To turn informer; betray an accomplice or secret.
  2. To give forth a loud shrill cry or sound.
  3. To give sensitive information about someone to a third party; to rat on someone.

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• stool

  1. (Slang) To act as a stool pigeon.
  2. To put out shoots in the form of a stool
  3. (Botany) To send up shoots or suckers.

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  1. (Slang) To act as a stool pigeon.
  2. To put out shoots in the form of a stool
  3. (Botany) To send up shoots or suckers.

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A rodent

• mouse

  1. Any of numerous small rodents of the families Muridae and Cricetidae, such as the house mouse, characteristically having a pointed snout, small rounded ears, and a long naked or almost hairless tail.
  2. Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa.
  3. (Computers) A handheld, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics.

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  1. Any of numerous small rodents of the families Muridae and Cricetidae, such as the house mouse, characteristically having a pointed snout, small rounded ears, and a long naked or almost hairless tail.
  2. Any of various similar or related animals, such as the jumping mouse, the vole, or the jerboa.
  3. (Computers) A handheld, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics.

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• muskrat

  1. A large aquatic rodent; Ondatra zibethicus.
  2. A large semiaquatic rodent (Ondatra zibethicus) native to North America and naturalized in Eurasia, having a dense brown coat and musk glands under a broad flat tail.
  3. Any of various American rodents (family Cricetidae) living in water and having glossy brown fur, a long tail, webbed hind feet, and a musklike odor

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  1. A large aquatic rodent; Ondatra zibethicus.
  2. A large semiaquatic rodent (Ondatra zibethicus) native to North America and naturalized in Eurasia, having a dense brown coat and musk glands under a broad flat tail.
  3. Any of various American rodents (family Cricetidae) living in water and having glossy brown fur, a long tail, webbed hind feet, and a musklike odor

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• vermin

  1. A vile, loathsome person
  2. Animals that prey on farm animals or game or that destroy crops.
  3. Various insects, rodents, or other small animals regarded as pests because destructive, disease-carrying, etc., as flies, lice, rats, or weasels

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  1. A vile, loathsome person
  2. Animals that prey on farm animals or game or that destroy crops.
  3. Various insects, rodents, or other small animals regarded as pests because destructive, disease-carrying, etc., as flies, lice, rats, or weasels

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*A deserter or betrayer

• informer

  1. A person who secretly accuses, or gives evidence against, another, often for a reward
  2. An informant, especially one who informs against others for compensation.

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  1. A person who secretly accuses, or gives evidence against, another, often for a reward
  2. An informant, especially one who informs against others for compensation.

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• turncoat

  1. A person who goes over to the opposite side or party; traitor
  2. A traitor; one who turns against a previous affiliation or allegiance.

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  1. A person who goes over to the opposite side or party; traitor
  2. A traitor; one who turns against a previous affiliation or allegiance.

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• fink

  1. A contemptible person.
  2. (Chiefly US, slang) Someone who betrays a trust.
  3. An informer

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  1. A contemptible person.
  2. (Chiefly US, slang) Someone who betrays a trust.
  3. An informer

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